As  filed  with  the  Securities  and  Exchange  Commission  on May  21,  2001
Registration No. 333-______


================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
              -----------------------------------------------------

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                          BioMarin Pharmaceutical Inc.
             (Exact name of registrant as specified in its charter)

                                    Delaware
                                   68-0397820
         (State or other jurisdiction of incorporation or organization)
                      (I.R.S. Employer Identification No.)

                     371 Bel Marin Keys Boulevard, Suite 210
                            Novato, California 94949
                                 (415) 884-6700
                   (Address, including zip code, and telephone
             number, including area code, of registrant's principal
                               executive offices)
                -------------------------------------------------

                               Raymond W. Anderson
                             Chief Financial Officer
                          BioMarin Pharmaceutical Inc.
                     371 Bel Marin Keys Boulevard, Suite 210
                            Novato, California 94949
                                 (415) 884-6700
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                -------------------------------------------------

                                    Copy to:
                           Siobhan McBreen Burke, Esq.
                      Paul, Hastings, Janofsky & Walker LLP
                       555 South Flower Street, 23rd Floor
                       Los Angeles, California 90071-2371
                                 (213) 683-6000

Approximate  date of commencement  of proposed sale to the public:  From time to
time after the effective date of this Registration Statement.

     If the only  securities  being  registered  on this form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. |_|

     If any of the securities being registered on this form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. |X|

     If this form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering. |_|

     If this form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration  statement number of the earlier effective  registration  statement
for the same offering. |_|

     If delivery of the  prospectus  is expected to be made pursuant to Rule 434
under the Securities Act, please check the following box.|_|


===================================================================================================================================
                                                 CALCULATION OF REGISTRATION FEE
===================================================================================================================================

     Title of Each Class of         Amount to be     Proposed Maximum        Proposed Maximum                 Amount of
   Securities to be Registered     Registered (1)   Offering Price Per          Aggregate                 Registration Fee
                                                        Share (2)           Offering Price (2)
- ---------------------------------- --------------- --------------------- ------------------------- --------------------------------
- ---------------------------------- --------------- --------------------- ------------------------- --------------------------------
                                                                                       

          Common Stock               5,621,960           $10.545              $59,283,568.00                 $14,821.00
- ---------------------------------- --------------- --------------------- ------------------------- --------------------------------
<FN>

(1) Includes  752,427  shares of common  stock to be issued upon the exercise of
certain  outstanding  common stock warrants

(2) Estimated  solely for the purpose of computing the registration fee required
to Section 6(b) of the  Securities  Act and computed  pursuant to Rule 457(c) of
the  Securities  Act,  based on the  average  of the high and low  prices of the
Common Stock on May 14, 2001 as reported on the NASDAQ National Market.
</FN>


     THE REGISTRANT  HEREBY AMENDS THIS  REGISTRATION  STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER  AMENDMENT  WHICH  SPECIFICALLY  STATES  THAT  THIS  REGISTRATION
STATEMENT SHALL  THEREAFTER  BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME EFFECTIVE ON
SUCH DATE AS THE SECURITIES  AND EXCHANGE  COMMISSION,  ACTING  PURSUANT TO SAID
SECTION 8(a), MAY DETERMINE.


================================================================================








                    SUBJECT TO COMPLETION DATED MAY 21, 2001

                             PRELIMINARY PROSPECTUS


                        5,621,960 Shares of Common Stock
                                 par value $.001

                          BioMarin Pharmaceutical Inc.

                              ---------------------

     This prospectus relates to an aggregate 5,621,960 shares of common stock of
BioMarin  Pharmaceutical  Inc.  that may be offered for sale by persons who have
acquired such shares in a private transaction.  Included in the aggregate number
of shares are  752,427  shares of common  stock which may be offered for sale by
selling  stockholders who may acquire them if they exercise  outstanding  common
stock  warrants we issued to them. We have  registered  the aggregate  number of
shares under the Securities Act of 1933 on behalf of these  stockholders so that
they  can sell  them in a public  offering  or other  distribution.  We will not
receive  any of the  proceeds  from the  offer  and sale of the  shares.  If the
warrants related to the shares of common stock offered for sale pursuant to this
prospectus  are exercised in full, we will receive  proceeds from such exercises
of $9,776,494.



     Our common stock  currently  trades on the NASDAQ  National  Market and the
Swiss SWX New Market under the symbol "BMRN."


See "Risk  Factors"  beginning  on page 2 to read  about  risks  that you should
consider before buying shares of our common stock.



     Neither the  Securities and Exchange  Commission  nor any other  regulatory
body has approved or disapproved these securities or passed upon the adequacy or
accuracy of this prospectus.  Any  representation  to the contrary is a criminal
offense.



                The date of this prospectus is ________ __, 2001



     The information in this prospectus is not complete and may be changed.  The
selling  stockholders  may not sell  these  securities  until  the  registration
statement filed with the Securities and Exchange  Commission is effective.  This
prospectus is not an offer to sell these  securities,  and is not  soliciting an
offer to buy  these  securities,  in any  state  where  the offer or sale is not
permitted.








                                TABLE OF CONTENTS

WHERE YOU CAN FIND MORE INFORMATION.........................................1

SUMMARY ................................................................... 2

FORWARD LOOKING STATEMENTS..................................................3

RISK FACTORS................................................................3

USE OF PROCEEDS............................................................16

SELLING STOCKHOLDERS.......................................................16

PLAN OF DISTRIBUTION.......................................................18

LEGAL MATTERS..............................................................20

EXPERTS .................................................................. 20













                       WHERE YOU CAN FIND MORE INFORMATION

     We are a reporting company and file annual,  quarterly and current reports,
proxy statements and other information with the SEC. You may read and copy these
reports,  proxy  statements and other  information at the SEC's public reference
rooms in Washington,  D.C., New York, NY and Chicago, IL. You can request copies
of these  documents by writing to the SEC and paying a fee for the copying cost.
Please call the SEC at  1-800-SEC-0330  for more information about the operation
of the public  reference  rooms. Our SEC filings are also available at the SEC's
Web site at  "http://www.sec.gov."  In  addition,  you can read and copy our SEC
filings at the office of the National Association of Securities Dealers, Inc. at
1735 K Street, Washington, D.C. 20006.

     The SEC allows us to  "incorporate by reference"  information  that we file
with them,  which means that we can  disclose  important  information  to you by
referring you to those documents.  The information  incorporated by reference is
an important part of this  prospectus,  and information  that we file later with
the SEC will automatically  update and supersede this information.  Further, all
filings we make under the Securities  Exchange Act of 1934 after the date of the
initial  registration  statement and prior to  effectiveness of the registration
statement shall be deemed to be incorporated by reference into this  prospectus.
We incorporate by reference the documents listed below and any future filings we
will make with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Securities
Exchange Act of 1934:

1.       Our Annual Report on Form 10-K for the year ended December 31, 2000;

2.       Our Definitive Proxy Statement dated April 3, 2000 filed in connection
         with our 2001 Annual Meeting of Stockholders;

3.       Our Quarterly Report on Form 10-Q for the quarter ended March 31, 2001;

4.       Our Current Report on Form 8-K, as filed on May 18, 2001; and

5.       The description of our common stock set forth in our Amendment No. 4 to
         our Registration Statement on Form S-1, filed with the SEC on
         July 22, 1999.

     We will provide to you at no cost a copy of any and all of the  information
incorporated  by  reference  into  the  registration  statement  of  which  this
prospectus is a part.  You may make a request for copies of this  information in
writing or by telephone. Requests should be directed to:

                          BioMarin Pharmaceutical Inc.
                          Attention: Investor Relations
                     371 Bel Marin Keys Boulevard, Suite 210
                                Novato, CA 94949
                                 (415) 884-6700



                                       1




                                     SUMMARY

     This prospectus contains forward looking statements which involve risks and
uncertainties. Our actual results could differ materially from those anticipated
in these forward  looking  statements as a result of certain  factors  appearing
under "Risk Factors" and elsewhere in this prospectus.

     The  following  summary  does not contain all the  information  that may be
important to you. You should read the entire prospectus, including the financial
statements and other  information  incorporated by reference in this prospectus,
before making an investment decision.

     We are a developer  of  carbohydrate  enzyme  therapies  for  debilitating,
life-threatening, chronic genetic diseases and other diseases and conditions. In
September  1998,  we  established a joint venture with Genzyme for the worldwide
development and commercialization of our lead drug product, Aldurazyme(TM),  for
the treatment of  mucopolysaccharidosis-I  or MPS-I, a serious genetic  disease.
Aldurazyme  has received  fast track  designation  for the treatment of the more
severe forms of MPS-I. The U.S. Food and Drug  Administration  (FDA) has granted
Aldurazyme  for the  treatment  of MPS-I an orphan  drug  designation  giving us
exclusive  rights to market  Aldurazyme  to treat MPS-I for seven years from the
date of FDA approval if  Aldurazyme  is the first  product to be approved by the
FDA for the  treatment  of MPS-I.  In  addition,  the  European  Commission  has
designated Aldurazyme for the treatment of MPS-I as an orphan medical product in
the European  Community,  giving us similar market  exclusivity in Europe for 10
years.

     MPS-I  is a  life-threatening  genetic  disease  caused  by the  lack  of a
sufficient  quantity of the enzyme  (alpha)-L-iduronidase,  which  affects about
3,400  patients in developed  countries,  including  approximately  1,000 in the
United  States  and  Canada.  Patients  with MPS-I  have  multiple  debilitating
symptoms  resulting from the buildup of carbohydrate  residues in all tissues in
the body. These symptoms  include delayed  physical and mental growth,  enlarged
livers and spleens,  skeletal and joint deformities,  airway obstruction,  heart
disease,  reduced  endurance and pulmonary  function,  and impaired  hearing and
vision. Most children with MPS-I will die from complications associated with the
disease before adulthood.

     Aldurazyme is a specific form of  recombinant  human  (alpha)-L-iduronidase
that replaces a genetic deficiency of  (alpha)-L-iduronidase  in MPS-I patients.
In April 1999, we completed the initial clinical trial of Aldurazyme. This trial
was a  twelve-month  treatment and  evaluation of ten patients with MPS-I at six
medical centers in the United States. The results of the trial were presented at
the American Society for Human Genetics in October 1999. Based on data collected
during the initial  twelve-month  evaluation period,  Aldurazyme met the primary
endpoints set forth in the  investigational  new drug application.  In addition,
Aldurazyme  demonstrated  efficacy  according to various secondary  endpoints in
each of the patients.  We continue to collect data from the ongoing treatment of
these  original  patients.  We  recently  released  the data  from the  two-year
follow-up evaluation,  which continued to suggest the efficacy of Aldurazyme. In
collaboration with Genzyme, we initiated a six-month Phase III clinical trial of
Aldurazyme  in December  2000 with the  intention  to file a  Biologics  License
Application (BLA) with the FDA late in 2001,  pending the successful  outcome of
the Phase III trial.  By the end of February  2001, the trial was fully enrolled
and all 45 MPS-I patients had received their initial weekly infusion.

     In  August  2000,  our Galli  Drive  manufacturing  facility  and a smaller
clinical manufacturing  laboratory in our Bel Marin Keys Boulevard facility were
both  subjected to an extensive  inspection by the State of California  Food and
Drug Branch and were granted licenses to produce clinical product.

     We submitted an Investigational  New Drug Application for recombinant human
N-acetylgalactosamine-4-sulfatase  also  known as  arylsulfatase  B or rhASB and
received  FDA  acceptance  to  begin a  Phase  I/II  clinical  trial  in  enzyme
replacement therapy for MPS-VI,  which was initiated on October 11, 2000. By the
end of February  2001,  all six patients in this trial had received at least six

                                       2

of their  twenty-four  weekly  infusions.  MPS-VI,  also known as Maroteaux-Lamy
syndrome, is similar in its clinical symptoms to MPS-I. However, MPS-VI does not
appear to have the central  nervous system  involvement  and mental  retardation
characteristics of the most severe form of MPS-I. We are manufacturing  clinical
bulk rhASB in our Bel Marin Keys  Boulevard  facility.  RhASB has received  fast
track  designation and has received orphan drug designation for the treatment of
MPS-VI by the FDA. In addition, the European Commission has designated rhASB for
the treatment of MPS-VI as an orphan medical product in the European Community.

     We have  successfully  conducted  preclinical  studies of our burn  enzyme,
Vibriolysin,  for use in burn  debridement  and  grafting  in pigs and mice.  We
expect to submit an  application  to the FDA or a foreign  equivalent to begin a
clinical trial for Vibriolysin by mid-year 2001.

     Our  principal  executive  offices  are  located  at  371  Bel  Marin  Keys
Boulevard,  Suite  210,  Novato,  CA 94949  and our  telephone  number  is (415)
884-6700.


                           FORWARD LOOKING STATEMENTS

     This prospectus  contains  forward  looking  statements.  These  statements
relate to future events or our future financial performance.  We have identified
forward looking statements in this prospectus using words such as "anticipates",
"believes,"  "could,"   "estimates,"   "expects,"   "intends,"  "may,"  "plans,"
"potential,"  "predicts,"  "should,"  or "will" or the negative of such terms or
other comparable terminology.  These statements are based on our beliefs as well
as  assumptions  we made using  information  currently  available to us. Because
these  statements  reflect our current views  concerning  future  events,  these
statements  involve  risks,   uncertainties,   and  assumptions.   These  risks,
uncertainties, assumptions and other factors, including the risks outlined under
"Risk Factors," that may cause our or our industry's  actual results,  levels of
activity,  performance or  achievements  to be materially  different from future
results,  levels of actual  activity,  performance or achievements  expressed or
implied by such forward looking statements.

     Although we believe that the expectations  reflected in the forward looking
statements  are  reasonable,  we  cannot  guarantee  future  results,  levels of
activity, performance or achievements. Moreover, neither we nor any other person
assumes responsibility for the accuracy and completeness of such statements.  We
are under no duty to update any of the forward looking statements after the date
of this prospectus to conform such statements to actual results, unless required
by law.


                                  RISK FACTORS

     An  investment  in our  common  stock  involves a high  degree of risk.  We
operate in a dynamic and rapidly changing  industry that involves numerous risks
and  uncertainties.  Before  purchasing these  securities,  you should carefully
consider the following risk factors,  as well as other information  contained in
this prospectus or incorporated by reference into this prospectus, in evaluating
an  investment  in the  securities  offered  by this  prospectus.  The risks and
uncertainties  described  below are not the only ones we face.  Other  risks and
uncertainties,  including those that we do not currently consider material,  may
impair our business.  If any of the risks discussed  below actually  occur,  our
business,  financial  condition,  operating  results  or  cash  flows  could  be
materially adversely affected.  This could cause the trading price of our common
stock to decline, and you may lose all or part of your investment.

If we continue to incur operating  losses for  a period longer than anticipated,
we may be unable to continue our  operations at planned levels and be forced to
reduce or discontinue operations.

     We are in an early  stage of  development  and have  operated at a net loss
since we were  formed.  Since we began  operations  in March 1997,  we have been

                                       3

engaged  primarily in research and  development.  We have no sales revenues from
any of our drug products. As of March 31, 2001, we had an accumulated deficit of
approximately  $90.2 million.  We expect to continue to operate at a net loss at
least through 2002. Our future profitability depends on our receiving regulatory
approval of our drug candidates and our ability to successfully  manufacture and
market any approved  drugs,  either by  ourselves  or jointly  with others.  The
extent  of our  future  losses  and  the  timing  of  profitability  are  highly
uncertain.   If  we  fail  to  become   profitable  or  are  unable  to  sustain
profitability  on a  continuing  basis,  then we may be unable to  continue  our
operations.

     Because  of  the  relative  small  size  and  scale  of  our   wholly-owned
subsidiary,  Glyko,  Inc.,  profits  from  its  products  and  services  will be
insufficient to offset the expenses associated with our pharmaceutical business.
As a result,  we expect that operating losses will continue and increase for the
foreseeable future.

If we fail  to  obtain  the capital necessary to fund our operations, we will be
unable to complete our product development programs.

     In the future, we may need to raise substantial  additional capital to fund
operations.  We cannot be certain  that any  financing  will be  available  when
needed. If we fail to raise additional  financing as we need it, we will have to
delay or terminate some or all of our product development programs.

     We expect to  continue  to spend  substantial  amounts of  capital  for our
operations for the foreseeable future.  Activities which will require additional
expenditures include:

o  Research and development programs

o  Preclinical studies and clinical trials

o  Process development, including quality systems for product manufacture

o  Regulatory processes in the United States and international jurisdictions

o  Commercial scale manufacturing capabilities

o  Expansion of sales and marketing activities

     The amount of capital we will need depends on many factors, including:

o  The progress, timing and scope of our research and development programs

o  The progress, timing and scope of our preclinical studies and clinical trials

o  The time and cost necessary to obtain regulatory approvals

o  The time and cost necessary to develop commercial processes, including
        quality systems

o  The time and cost necessary to build our manufacturing facilities and obtain
         the necessary regulatory approvals for those facilities

o  The time and cost necessary to respond to technological and market
         developments

o  Any changes made or new developments in our existing collaborative, licensing
         and other commercial relationships

o  Any new collaborative, licensing and other commercial relationships that we
         may establish

                                       4

     Moreover,  our fixed  expenses  such as rent,  license  payments  and other
contractual  commitments are substantial and will increase in the future.  These
fixed expenses will increase because we may enter into:

o  Additional leases for new facilities and capital equipment

o  Additional licenses and collaborative agreements

o  Additional contracts for consulting, maintenance and administrative services

o  Additional contracts for product manufacturing

     We  believe  that the cash,  cash  equivalents  and  short-term  investment
securities  balances at March 31,  2001,  together  with the  proceeds  from our
recent  private  placement of our common  stock,  will be sufficient to meet our
operating and capital  requirements  at least through mid 2002. This estimate is
based on assumptions and estimates, which may prove to be wrong. As a result, we
may need or choose to obtain additional financing during that time.

If we fail to obtain regulatory approval to commercially manufacture or sell any
of our future  drug  products, or  if approval  is delayed, we will be unable to
generate revenue from the sale of our products.

     We must obtain  regulatory  approval  before  marketing or selling our drug
products in the U.S. and in foreign jurisdictions. In the United States, we must
obtain  FDA  approval  for each drug that we  intend to  commercialize.  The FDA
approval  process is  typically  lengthy and  expensive,  and  approval is never
certain.  Products  distributed  abroad are also  subject to foreign  government
regulation.  None of our drug  products has received  regulatory  approval to be
commercially  marketed and sold. If we fail to obtain  regulatory  approval,  we
will be unable to market  and sell our drug  products.  Because of the risks and
uncertainties in biopharmaceutical development, our drug candidates could take a
significantly  longer  time to gain  regulatory  approval  than we expect or may
never gain  approval.  If  regulatory  approval  is  delayed,  our  management's
credibility,  the  value  of our  Company  and  our  operating  results  will be
adversely affected.

To  obtain  regulatory   approval  to  market our products,  preclinical studies
and costly and lengthy  clinical  trials may be required  and the results of the
studies and trials are highly uncertain.

     As part of the regulatory  approval  process,  we must conduct,  at our own
expense,  preclinical studies in the laboratory on animals,  and clinical trials
on humans for each drug candidate.  We expect the number of preclinical  studies
and  clinical  trials that the  regulatory  authorities  will  require will vary
depending  on the drug  product,  the  disease  or  condition  the drug is being
developed to address and regulations  applicable to the particular  drug. We may
need  to  perform   multiple   preclinical   studies  using  various  doses  and
formulations  before we can begin clinical trials,  which could result in delays
in our  ability  to market  any of our drug  products.  Furthermore,  even if we
obtain  favorable  results in  preclinical  studies on  animals,  the results in
humans may be significantly different.

     After we have conducted preclinical studies in animals, we must demonstrate
that our drug  products  are safe and  efficacious  for use on the target  human
patients in order to receive regulatory approval for commercial sale. Adverse or
inconclusive  clinical results would stop us from filing for regulatory approval
of our products.  Additional  factors that can cause delay or termination of our
clinical trials include:

o        Slow patient enrollment

o        Longer treatment time required to demonstrate efficacy

o        Lack of sufficient supplies of the drug candidate

                                       5

o        Adverse medical events or side effects in treated patients

o        Lack of effectiveness of the drug candidate being tested

o        Regulatory requests for additional clinical trials

     Typically, if a drug product is intended to treat a chronic disease, safety
and efficacy  data must be gathered over an extended  period of time,  which can
range from six months to three years or more.  In addition,  clinical  trials on
humans are typically  conducted in three phases.  The FDA generally requires two
pivotal  clinical  trials that  demonstrate  substantial  evidence of safety and
efficacy and appropriate  dosing in a broad patient population at multiple sites
to support an application for regulatory approval. If a drug is intended for the
treatment of a serious or  life-threatening  condition and the drug demonstrates
the potential to address unmet medical needs for this condition,  fewer clinical
trials  may  be  sufficient  to  prove  safety  and  efficacy  under  the  FDA's
Modernization Act of 1997.

     In May 1999, we completed a twelve-month patient evaluation for the initial
clinical trial of our lead drug product, Aldurazyme, for the treatment of MPS-I.
The results were presented at the American Society for Human Genetics in October
1999. We continue to collect data from the ongoing  treatment of these  original
patients.  The initial  clinical  trial  treated ten patients  with MPS-I at six
medical centers in the United States.  Two of the original ten patients enrolled
in the first  clinical trial of Aldurazyme  died in 2000.  Based on medical data
collected from clinical  investigative  sites,  neither case directly implicated
treatment  with  Aldurazyme  as the cause of death.  The data  suggest  that one
patient died due to a combination  of systemic  viral  illness,  residual  MPS-I
coronary disease,  and external factors.  This patient had received 103 weeks of
Aldurazyme  administration.  For the other  patient,  the data  suggest that the
patient  died  due  to  complications  following  posterior  spinal  fusion  for
scoliosis. This patient had received 127 weeks of Aldurazyme administration.

The fast track designation for our product candidates may not actually lead to a
faster review process.

     Although  Aldurazyme  and rhASB have obtained fast track  designations,  we
cannot  guarantee a faster  review  process or faster  approval  compared to the
normal FDA procedures.

We will not be able to sell our products if we fail to comply with manufacturing
regulations.

     Before we can begin commercial  manufacture of our products, we must obtain
regulatory  approval of our  manufacturing  facility and  process.  In addition,
manufacture  of our drug  products  must  comply  with the  FDA's  current  Good
Manufacturing   Practices   regulations,   commonly  known  as  cGMP.  The  cGMP
regulations  govern quality control and  documentation  policies and procedures.
Our manufacturing  facilities are continuously subject to inspection by the FDA,
the State of California  and foreign  regulatory  authorities,  before and after
product approval. Our Galli Drive and our Bel Marin Keys Boulevard manufacturing
facilities  have been  inspected  and  licensed by the State of  California  for
clinical pharmaceutical  manufacture.  We cannot guarantee that these facilities
will pass federal or international  regulatory  inspection.  We cannot guarantee
that we, or any potential third-party manufacturer of our drug products, will be
able to comply with cGMP regulations.

     We must pass Federal,  state and European  regulatory  inspections,  and we
must manufacture three process qualification batches (five process qualification
batches for Europe) to final  specifications under cGMP controls for each of our
drug products  before the marketing  applications  can be approved.  Although we
have completed process qualification  batches for Aldurazyme,  these batches may
be rejected by the  regulatory  authorities  and we may be unable to manufacture
the process qualification batches for our other products or pass the inspections
in a timely manner, if at all.

                                       6

If we fail to obtain orphan drug  exclusivity for our  products, our competitors
may sell products to treat the  same conditions and our revenues may be reduced.

     As part of our business  strategy,  we intend to develop  drugs that may be
eligible  for FDA and  European  Community  orphan drug  designation.  Under the
Orphan  Drug Act,  the FDA may  designate a product as an orphan drug if it is a
drug  intended  to treat a rare  disease  or  condition,  defined  as a  patient
population of less than 200,000 in the United  States.  The company that obtains
the first FDA  approval  for a  designated  orphan drug for a given rare disease
receives marketing exclusivity for use of that drug for the stated condition for
a period of seven years.  However,  different drugs can be approved for the same
condition.  Similar  regulations are available in the European  Community with a
ten-year period of market exclusivity.

     Because the extent and scope of patent  protection for our drug products is
limited, orphan drug designation is particularly important for our products that
are eligible  for orphan drug  designation.  We plan to rely on the  exclusivity
period under the orphan drug designation to maintain a competitive  position. If
we do not obtain orphan drug  exclusivity  for our drug  products,  which do not
have patent protection, our competitors may then sell the same drug to treat the
same condition.

     We received  orphan drug  designation  from the FDA for  Aldurazyme for the
treatment of MPS-I in September  1997. In February 1999, we received orphan drug
designation from the FDA for rhASB for the treatment of MPS-VI. In February 2001
we  received  orphan  drug  designation  from the  European  Community  for both
products.  Even though we have obtained orphan drug  designation for these drugs
and even if we obtain orphan drug designation for other products we develop,  we
cannot guarantee that we will be the first to obtain marketing  approval for any
orphan indication or that exclusivity would effectively protect the product from
competition.  Orphan drug  designation  neither shortens the development time or
regulatory  review time of a drug so designated nor gives the drug any advantage
in the regulatory review or approval process.

Because the  target  patient populations  for  our  products  are  small we must
achieve significant market share and  obtain  high  per  patient prices  for our
products to achieve profitability.

     Our initial drug candidates target diseases with small patient populations.
As a  result,  our per  patient  prices  must  be high  enough  to  recover  our
development  costs and achieve  profitability.  For example,  two of our initial
drug products in genetic  diseases,  Aldurazyme and rhASB,  target patients with
MPS-I and MPS-VI,  respectively.  We estimate that there are approximately 3,400
patients with MPS-I and 1,100  patients with MPS-VI in the developed  world.  We
believe  that we will need to market  worldwide  to achieve  significant  market
share. In addition, we are developing other drug candidates to treat conditions,
such as other  genetic  diseases  and serious burn  wounds,  with small  patient
populations.  We cannot  be  certain  that we will be able to obtain  sufficient
market share for our drug products at a price high enough to justify our product
development efforts.

If we fail to obtain an adequate level of reimbursement for our drug products by
third-party payers,  there  would  be  no  commercially  viable  markets for our
products.

     The course of treatment  for patients with MPS-I using  Aldurazyme  and for
patients with MPS-VI using rhASB is expected to be expensive. We expect patients
to need treatment  throughout their  lifetimes.  We expect that most families of
patients will not be capable of paying for this treatment themselves. There will
be no commercially  viable market for Aldurazyme or rhASB without  reimbursement
from third-party payers.

     Third-party  payers,  such as government or private  health care  insurers,
carefully  review  and  increasingly  challenge  the price  charged  for  drugs.
Reimbursement  rates from private  companies vary  depending on the  third-party
payer,  the  insurance  plan  and  other  factors.   Reimbursement   systems  in
international   markets  vary  significantly  by  country  and  by  region,  and
reimbursement  approvals  must be obtained  on a  country-by-country  basis.  We

                                       7

cannot be certain  that  third-party  payers will pay for the costs of our drugs
and the courses of treatment.  Even if we are able to obtain  reimbursement from
third-party payers, we cannot be certain that reimbursement rates will be enough
to  allow us to  profit  from  sales of our  drugs  or to  justify  our  product
development expenses.

     We currently have no expertise obtaining  reimbursement.  We expect to rely
on the expertise of our joint venture  partner  Genzyme to obtain  reimbursement
for the costs of Aldurazyme. We cannot predict what the reimbursement rates will
be. In addition,  we will need to develop our own  reimbursement  expertise  for
future drug candidates unless we enter into  collaborations with other companies
with the necessary expertise.

     We expect that in the future, reimbursement will be increasingly restricted
both in the United States and  internationally.  The  escalating  cost of health
care has led to increased  pressure on the health care industry to reduce costs.
Governmental  and private  third-party  payers have proposed health care reforms
and cost reductions. A number of federal and state proposals to control the cost
of health  care,  including  the cost of drug  treatments  have been made in the
United States.  In some foreign  markets,  the  government  controls the pricing
which would affect the profitability of drugs.  Current  government  regulations
and  possible  future  legislation  regarding  health care may affect our future
revenues  from  sales of our drugs and may  adversely  affect our  business  and
prospects.

If we are unable to protect  our  proprietary  technology, we may not be able to
compete as effectively.

     Where  appropriate,  we seek patent  protection for certain  aspects of our
technology.  Meaningful  patent  protection may not be available for some of the
enzymes we are  developing,  including  Aldurazyme  and rhASB.  If we must spend
significant time and money protecting our patents, designing around patents held
by others or licensing, for large fees, patents or other proprietary rights held
by others, our business and financial prospects may be harmed.

     The patent positions of  biotechnology  products are complex and uncertain.
The  scope  and  extent  of  patent  protection  for  some of our  products  are
particularly  uncertain  because key  information  on some of the enzymes we are
developing  has existed in the public domain for many years.  Other parties have
published the  structure of the enzymes,  the methods for purifying or producing
the enzymes or the methods of treatment.  The composition and genetic  sequences
of animal  and/or  human  versions of many of our enzymes,  including  those for
Aldurazyme  and rhASB,  have been published and are believed to be in the public
domain.  The  composition  and genetic  sequences of other MPS enzymes  which we
intend to develop as  products  have also been  published.  Publication  of this
information may prevent us from obtaining  composition-of-matter  patents, which
are generally  believed to offer the strongest  patent  protection.  For enzymes
with no prospect of composition-of-matter patents, we will depend on orphan drug
status to provide us a competitive advantage.

     In addition,  our owned and licensed patents and patent applications do not
ensure  the  protection  of our  intellectual  property  for a  number  of other
reasons:

o                 We do not know whether our patent applications will
                  result in actual patents. For example, we may not have
                  developed a method for treating a disease before others
                  developed similar methods.

o                 Competitors may interfere with our patent process in
                  a variety of ways. Competitors may claim that they invented
                  the claimed invention prior to us. Competitors may also claim
                  that we are infringing on their patents and therefore cannot
                  practice our technology as claimed under our patent.
                  Competitors may also contest our patents by showing the patent
                  examiner that the invention was not original, was not novel or
                  was obvious. As a company, we have no meaningful experience
                  with competitors interfering with our patents or patent
                  applications.

                                       8


o                 Enforcing patents is expensive and may absorb
                  significant time of our management. In litigation, a
                  competitor could claim that our issued patents are not valid
                  for a number of reasons. If the court agrees, we would lose
                  that patent.

o                 Even if we receive a patent, it may not provide much
                  practical protection. If we receive a patent with a narrow
                  scope, then it will be easier for competitors to design
                  products that do not infringe on our patent.

     In addition,  competitors also seek patent protection for their technology.
There are many patents in our field of technology,  and we cannot guarantee that
we do not  infringe  on those  patents or that we will not  infringe  on patents
granted in the future.  If a patent  holder  believes  our product  infringes on
their  patent,  the  patent  holder may sue us even if we have  received  patent
protection  for our  technology.  If someone  else  claims we  infringe on their
technology, we would face a number of issues, including:

o Defending a lawsuit takes significant time and can be very expensive.

o If the court decides that our product infringes on
    the competitor's patent, we may have to pay substantial
    damages for past infringement.

o The court may prohibit us from selling or licensing
     the product unless the patent holder licenses the patent to
     us. The patent holder is not required to grant us a license.
     If a license is available, we may have to pay substantial
     royalties or grant cross-licenses to our patents.

o Redesigning our product so it does not infringe may
     not be possible or could require substantial funds and time.

     It  is  also  unclear   whether  our  trade  secrets  will  provide  useful
protection.  While we use reasonable  efforts to protect our trade secrets,  our
employees  or  consultants  may   unintentionally   or  willfully  disclose  our
information  to  competitors.  Enforcing  a claim that  someone  else  illegally
obtained and is using our trade secrets,  like patent  litigation,  is expensive
and time  consuming,  and the  outcome is  unpredictable.  In  addition,  courts
outside the United States are sometimes  less willing to protect trade  secrets.
Our competitors may  independently  develop  equivalent  knowledge,  methods and
know-how.

     We may also support and  collaborate  in research  conducted by  government
organizations  or by  universities.  We cannot guarantee that we will be able to
acquire  any  exclusive  rights to  technology  or products  derived  from these
collaborations.  If we do not  obtain  required  licenses  or  rights,  we could
encounter delays in product  development while we attempt to design around other
patents or even be prohibited from developing, manufacturing or selling products
requiring these licenses. There is also a risk that disputes may arise as to the
rights to technology or products  developed in collaboration with other parties.

The United  States  Patent and Trademark  Office  recently  issued a patent that
related to (alpha)-L-iduronidase.  If Aldurazyme infringes on this patent and we
are not able to  successfully  challenge it, we may be prevented  from producing
Aldurazyme unless and until we obtain a license.

     The United States Patent and Trademark Office recently issued a patent that
includes  claims  related  to  (alpha)-L-iduronidase.  Our  lead  drug  product,
Aldurazyme,  may infringe on this patent. We believe that this patent is invalid
on a number of grounds.  A patent making the same claims was filed in Europe and
has been rejected and cannot be refiled.  Our challenges to the U.S.  patent may
be  unsuccessful,  but the  rejection of the European  application  supports our
strategy  to  challenge  the  validity  of  the  U.S.  patent.  Even  if we  are
successful,  challenging the patent may be expensive,  require our management to
devote  significant time to this effort and may delay  commercialization  of our
product in the United States.

     The patent holder has granted an exclusive license for products relating to
this  patent  to one of  our  competitors.  If we  are  unable  to  successfully
challenge  the  patent,  we may be unable to  produce  Aldurazyme  in the United
States unless we can obtain a sub-license from the current licensee. The current
licensee  is not  required  to  grant us a  license  and  even if a  license  is
available,  we may have to pay substantial  license fees,  which could adversely
affect our business and operating results.

If our joint venture  with  Genzyme were  terminated,  we  could  be barred from
commercializing Aldurazyme or our ability to  commercialize  Aldurazyme would be
delayed or diminished.

     We are relying on Genzyme to apply the expertise it has  developed  through
the launch and sale of Ceredase(R) and Cerezyme(R)  enzymes for Gaucher disease,
a  rare  genetic  disease,  to  the  marketing  of  our  initial  drug  product,
Aldurazyme.  Because it is our initial product, our operations are substantially
dependent upon the  development of  Aldurazyme.  We have no experience  selling,
marketing or obtaining  reimbursement for pharmaceutical  products. In addition,
without Genzyme we would be required to pursue foreign regulatory approvals.  We
have no experience in seeking foreign regulatory approvals.

     We cannot  guarantee  that Genzyme will devote the  resources  necessary to
successfully  market  Aldurazyme.  In addition,  either party may  terminate the
joint venture for specified reasons, including if the other party is in material
breach of the  agreement or has  experienced a change of control or has declared
bankruptcy  and  also is in  breach  of the  agreement.  Either  party  may also
terminate the  agreement  upon  one-year  prior  written  notice for any reason.
Furthermore,  we may terminate the joint venture if Genzyme fails to fulfill its
contractual  obligation to pay us $12.1 million in cash upon the approval of the
BLA for Aldurazyme.

     Upon  termination  of the joint  venture  one party  must buy out the other
party's  interest  in the joint  venture.  The party who buys out the other will
then  also  obtain,  exclusively,  all  rights  to  Aldurazyme  and any  related
intellectual property and regulatory approvals.

     If the joint  venture is  terminated  by Genzyme  for a breach on our part,
Genzyme would be granted,  exclusively,  all of the rights to Aldurazyme and any
related intellectual property and regulatory approvals and would be obligated to
buy out our interest in the joint venture.  We would then  effectively be unable
to develop and commercialize  Aldurazyme. If we terminated the joint venture for
a breach by Genzyme,  we would be obligated to buy out Genzyme's interest in the
joint  venture and, we would then be granted all of these  rights to  Aldurazyme
exclusively.   While  we  could  then  continue  to  develop  Aldurazyme,   that
development would be slowed because we would have to divert substantial  capital
to buy out Genzyme's interest in the joint venture. We would then either have to
search for a new partner to  commercialize  the  product  and to obtain  foreign
regulatory approvals or have to develop these capabilities ourselves.

     If the joint venture is terminated by us without cause,  Genzyme would have
the option, exercisable for one year, to immediately buy out our interest in the
joint venture and obtain all rights to Aldurazyme exclusively.  If the agreement
is terminated by Genzyme  without cause,  we would have the option,  exercisable
for one year, to immediately buy out Genzyme's interest in the joint venture and
obtain these  exclusive  rights.  In event of  termination of the buy out option
without exercise by the non-terminating  party as described above, all right and
title to Aldurazyme is to be sold to the highest bidder, with the proceeds to be
split equally between Genzyme and us.

     If the joint venture is terminated by us because  Genzyme fails to make the
$12.1  million  payment to us upon FDA  approval of the BLA for  Aldurazyme,  we
would be  obligated  to buy  Genzyme's  interest in the joint  venture and would
obtain all rights to Aldurazyme exclusively.  If the joint venture is terminated
by either party because the other  declared  bankruptcy and is also in breach of
the agreement, the terminating party would be obligated to buy out the other and
would  obtain  all rights to  Aldurazyme  exclusively.  If the joint  venture is
terminated by a party  because the other party  experienced a change of control,
the terminating  party shall notify the other party, the offeree,  of its intent
to buy out the  offeree's  interest in the joint venture for a stated amount set
by the terminating party at its discretion.  The offeree must then either accept

                                       10

this offer or agree to buy the terminating party's interest in the joint venture
on those same terms.  The party who buys out the other would then have exclusive
rights to Aldurazyme.

     If we were obligated, or given the option, to buy out Genzyme's interest in
the joint  venture,  and gain exclusive  rights to  Aldurazyme,  we may not have
sufficient  funds to do so and we may not be able to obtain the  financing to do
so.  If we fail to buy out  Genzyme's  interest  we may be held in breach of the
agreement  and may lose any claim to the rights to  Aldurazyme  and the  related
intellectual  property and regulatory  approvals.  We would then  effectively be
prohibited from developing and commercializing the product.

     Termination  of the  joint  venture  in  which  we  retain  the  rights  to
Aldurazyme  could cause us  significant  delays in product  launch in the United
States,  difficulties  in  obtaining  third-party  reimbursement  and  delays or
failure  to obtain  foreign  regulatory  approval,  any of which  could hurt our
business  and  results  of  operations.  Since  Genzyme  funds  50% of the joint
venture's operating expenses,  the termination of the joint venture would double
our  financial  burden and reduce the funds  available  to us for other  product
programs.

If we are unable to  manufacture  our drug products in sufficient quantities and
at acceptable cost, we may be unable to  meet demand  for  our products and lose
potential revenues or have reduced margins.

     With the exception of Aldurazyme,  we have no experience manufacturing drug
products in volumes  that will be  necessary to support  commercial  sales.  Our
manufacturing  processes  may not  meet  initial  expectations  as to  schedule,
reproducibility,  yields,  purity,  costs,  quality,  and other  measurements of
performance.   Improvements  in  manufacturing   processes  typically  are  very
difficult to achieve and are often very expensive. We cannot know with certainty
how long it might take to make  improvements if it became necessary to do so. If
we contract for manufacturing  services with an unproven process, our contractor
is subject to the same uncertainties, high standards and regulatory controls.

If we are unable to establish and maintain commercial scale manufacturing within
our planned time and  cost  parameters,  sales of our products and our financial
performance will be adversely affected.

     Although we have successfully  manufactured  Aldurazyme at commercial scale
within  our  cost  parameters,  we  cannot  guarantee  that  we  will be able to
manufacture rhASB,  Vibriolysin or any future product candidates successfully in
a scale large enough to support their respective commercial markets.

     We may  encounter  problems  with any of the  following  if we  attempt  to
increase the scale or size of manufacturing:

o        Design, construction and qualification of manufacturing facilities that
            meet regulatory requirements

o        Production yields

o        Purity

o        Quality control and assurance systems

o        Shortages of qualified personnel

o        Compliance with regulatory requirements

     We have  constructed  and  built-out  a total of 41,200  square feet at our
Novato  facilities for  manufacturing  capability  for Aldurazyme and rhASB.  We
expect to expand the Galli Drive  facility in stages  over time,  which  creates

                                       11

additional   operational   complexity  and   challenges.   We  expect  that  the
manufacturing process of all of our new products,  including rhASB, will require
lengthy  significant  time and resources before we can begin to manufacture them
(or have them manufactured by third parties) in commercial quantity.  Even if we
can establish the necessary  capacity,  we cannot be certain that  manufacturing
costs will be commercially reasonable,  especially if third-party  reimbursement
is substantially lower than expected.

     In order to a chieve our product  cost  targets we must  develop  efficient
manufacturing processes either by:

o  Improving the product yield from our current cell
     lines, colonies of cells which have a common genetic make-up,

o  Improving the processes licensed from others, or

o  Developing more efficient, lower cost recombinant cell lines and
        production processes.

     A recombinant  cell line is a cell line with foreign DNA inserted  which is
used to  produce  a  protein  that it would  not have  otherwise  produced.  The
development  of a stable,  high  production  cell  line for any given  enzyme is
risky,  expensive and  unpredictable  and may not result in adequate yields.  In
addition, the development of protein purification processes is difficult and may
not produce the high purity required with acceptable  yield and costs or may not
result in  adequate  shelf-lives  of the final  products.  If we are not able to
develop  efficient  manufacturing  processes,  the  investment in  manufacturing
capacity sufficient to satisfy market demand will be much greater and will place
heavy  financial  demands upon us. If we do not achieve our  manufacturing  cost
targets,  we will have lower  margins and reduced  profitability  in  commercial
production and larger losses in manufacturing start-up phases.

If we are unable to  increase  our marketing and distribution capabilities or to
enter into agreements with  third  parties  to  do  so, our  ability to generate
revenues will be diminished.

     If we cannot increase our marketing  capabilities  either by developing our
sales and marketing  organization or by entering into agreements with others, we
may be unable to successfully sell our products. If we are unable to effectively
sell our drug products, our ability to generate revenues will be diminished.

     To increase our distribution and marketing for both our drug candidates and
our Glyko,  Inc.  products,  we will have to increase  our  current  sales force
and/or enter into third-party marketing and distribution  agreements.  We cannot
guarantee that we will be able to hire in a timely manner,  the qualified  sales
and marketing personnel we need, if at all. Nor can we guarantee that we will be
able to enter into any marketing or distribution agreements on acceptable terms,
if at all. If we cannot increase our marketing capabilities as we intend, either
by increasing  our sales force or entering into  agreements  with third parties,
sales of our products may be adversely affected.

     Under our joint venture with Genzyme,  Genzyme is responsible for marketing
and  distributing  Aldurazyme.  We  cannot  guarantee  that  we  will be able to
establish sales and  distribution  capabilities  or that the joint venture,  any
future collaborators or we will successfully sell any of our drug candidates.

If we fail to compete successfully, our revenues and  operating  results will be
adversely affected.

     Our competitors may develop,  manufacture and market products that are more
effective or less expensive than ours. They may also obtain regulatory approvals
for their products faster than we can obtain them, including those products with
orphan drug  designation,  or commercialize  their products before we do. If our
competitors  successfully  commercialize  a product,  which  treats a given rare
genetic disease before we do, we will effectively be precluded from developing a
product  to treat that  disease  because  the  patient  populations  of the rare
genetic  diseases are so small. If our competitor gets orphan drug  exclusivity,
we could be  precluded  from  marketing  our version for seven  years.  However,
different  drugs can be approved for the same  condition.  These  companies also
compete  with  us  to  attract   qualified   personnel  and   organizations  for

                                       12

acquisitions, joint ventures or other collaborations.  They also compete with us
to attract  academic  research  institutions  as partners  and to license  these
institutions' proprietary technology. If our competitors successfully enter into
partnering   arrangements   or  license   agreements   with  academic   research
institutions,   we  will  then  be  precluded   from  pursuing   those  specific
opportunities.  Since each of these  opportunities is unique, we may not be able
to find a substitute.  Several  pharmaceutical and biotechnology  companies have
already established  themselves in the field of enzyme  therapeutics,  including
Genzyme, our joint venture partner. These companies have already begun many drug
development  programs,  some of  which  may  target  diseases  that we are  also
targeting,  and have already entered into partnering and licensing  arrangements
with   academic   research   institutions,   reducing   the  pool  of  available
opportunities.

     Universities  and  public  and  private  research   institutions  are  also
competitors.  While these  organizations  primarily  have  educational  or basic
research objectives, they may develop proprietary technology and acquire patents
that we may need for the  development of our drug  products.  We will attempt to
license this  proprietary  technology,  if available.  These licenses may not be
available to us on acceptable  terms, if at all. We also directly compete with a
number of these  organizations to recruit personnel,  especially  scientists and
technicians.

     We believe that established technologies provided by other companies,  such
as laboratory and testing  services firms,  compete with Glyko,  Inc.'s products
and  services.  For  example,  Glyko's  FACE(R)  Imaging  System  competes  with
alternative   carbohydrate   analytical   technologies,    including   capillary
electrophoresis,  high-pressure  liquid  chromatography,  mass  spectrometry and
nuclear magnetic  resonance  spectrometry.  These competitive  technologies have
established  customer  bases and are more widely used and accepted by scientific
and  technical   personnel  because  they  can  be  used  for   non-carbohydrate
applications.  Companies  competing  with  Glyko  may  have  greater  financial,
manufacturing and marketing resources and experience.

If we fail to manage our growth or  fail  to  recruit  and retain personnel, our
product development programs may be delayed.

     Our rapid growth has strained our  managerial,  operational,  financial and
other resources. We expect this growth to continue. We have entered into a joint
venture with Genzyme. If we receive FDA approval to market Aldurazyme, the joint
venture  will  be  required  to  devote  additional  resources  to  support  the
commercialization of Aldurazyme.

     To manage expansion effectively, we need to continue to develop and improve
our research and development capabilities, manufacturing and quality capacities,
sales and marketing  capabilities and financial and administrative  systems.  We
cannot guarantee that our staff,  financial  resources,  systems,  procedures or
controls will be adequate to support our operations or that our management  will
be able to manage successfully future market  opportunities or our relationships
with customers and other third parties.

     Our future  growth and success  depend on our  ability to recruit,  retain,
manage and motivate our  employees.  The loss of key  scientific,  technical and
managerial  personnel  may  delay  or  otherwise  harm our  product  development
programs.  Any harm to our  research  and  development  programs  would harm our
business and prospects.

     Because  of  the  specialized  scientific  and  managerial  nature  of  our
business,  we rely  heavily  on our  ability to  attract  and  retain  qualified
scientific,  technical and  managerial  personnel.  In  particular,  the loss of
Fredric D. Price,  our Chairman and Chief Executive  Officer,  or Christopher M.
Starr,  Ph.D.,  our  Vice  President  for  Research  and  Development,  could be
detrimental to us if we cannot recruit suitable replacements in a timely manner.
While Mr. Price and Dr. Starr are parties to employment  agreements  with us, we
cannot  guarantee  that they will  remain  employed  with us in the  future.  In
addition,  these  agreements  do not restrict  their  ability to compete with us
after their employment is terminated. The competition for qualified personnel in
the  biopharmaceutical  field is  intense.  We  cannot be  certain  that we will
continue to attract and retain qualified personnel necessary for the development
of our business.

                                       13


If product liability  lawsuits are successfully brought against us, we may incur
substantial liabilities.

     We are exposed to the potential  product  liability  risks  inherent in the
testing,   manufacturing   and   marketing   of   human   pharmaceuticals.   The
BioMarin/Genzyme  LLC  maintains  product  liability  insurance for our clinical
trials of  Aldurazyme.  We have obtained  insurance  against  product  liability
lawsuits  for the  clinical  trials  for  rhASB.  We may be subject to claims in
connection  with our current  clinical trials for Aldurazyme and rhASB for which
the joint  venture's or our insurance  coverages are not adequate.  We cannot be
certain  that  if  Aldurazyme  receives  FDA  approval,  the  product  liability
insurance  the  joint  venture  will  need to  obtain  in  connection  with  the
commercial  sales of Aldurazyme will be available in meaningful  amounts or at a
reasonable  cost.  In addition,  we cannot be certain  that we can  successfully
defend any product  liability  lawsuit brought against us. If we are the subject
of a  successful  product  liability  claim  which  exceeds  the  limits  of any
insurance  coverage we may obtain,  we may incur  substantial  liabilities which
would adversely affect our earnings and financial condition.

Our stock price may be  volatile  and  an investment in our stock could suffer a
decline in value.

     Our  valuation  and stock price since the  beginning  of trading  after our
initial  public  offering  have had no  meaningful  relationship  to  current or
historical  earnings,  asset values,  book value or many other criteria based on
conventional  measures of stock value. The market price of our common stock will
fluctuate due to factors including:

o   Progress of Aldurazyme and our other lead drug
        products through the regulatory process, especially Aldurazyme
        regulatory actions in the United States

o   Results of clinical trials, announcements of technological innovations
         or new products by us or our
         competitors

o   Government regulatory action affecting our drug
         candidates or our competitors' drug candidates in both the
         United States and foreign countries

o   Developments or disputes concerning patent or proprietary rights

o   General market conditions for emerging growth and biopharmaceutical
        companies

o   Economic conditions in the United States or abroad

o   Actual or anticipated fluctuations in our operating results

o   Broad market fluctuations in the United States or in Europe may cause the
        market price of our common stock to fluctuate

o   Changes in company assessments or financial estimates by securities analysts

     In  addition,  the value of our common  stock may  fluctuate  because it is
listed on both the  NASDAQ  National  Market  and the Swiss  Exchange's  SWX New
Market. Listing on both exchanges may increase stock price volatility due to:

o        Trading in different time zones

o        Different ability to buy or sell our stock

o        Different market conditions in different capital markets

o        Different trading volume

                                       14


     In the past, following periods of large price declines in the public market
price of a company's  securities,  securities class action  litigation has often
been  initiated  against that  company.  Litigation of this type could result in
substantial costs and diversion of management's  attention and resources,  which
would hurt our business.  Any adverse  determination  in  litigation  could also
subject us to significant liabilities.

If  all  or  a   substantial   portion of the shares of our common stock offered
for sale by this  prospectus are sold in a short period of time, our stock price
may be adversely affected. Our stock price may also be adversely affected by the
perception that such sales could occur.

     The shares of common stock offered for sale by this prospectus represents a
significant  portion of our outstanding common stock. We cannot control when the
selling  stockholders will sell their shares. If all or a substantial portion of
the shares of common  stock  offered for sale by this  prospectus  are sold in a
short period of time, the common stock  available for sale may exceed the demand
and the stock price may be adversely affected. In addition,  the mere perception
that such sales could occur may depress the price of our common stock.

If our officers, directors and  largest  stockholder elect to act together, they
may be able  to  control  our  management  and  operations, acting in their best
interests and not necessarily those of other stockholders.

     Our directors and officers control  approximately  41.3% of the outstanding
shares of our common stock.  Glyko Biomedical Ltd. owns 27.0% of the outstanding
shares of our capital stock. The president and chief executive  officer of Glyko
Biomedical and a significant shareholder of Glyko Biomedical serve as two of our
directors. As a result, due to their concentration of stock ownership, directors
and officers,  if they act together,  may be able to control our  management and
operations,  and may be able to prevail on all matters  requiring a  stockholder
vote including:

o  The election of all directors;

o  The amendment of charter documents or the approval of a merger, sale of
        assets or other major corporate transactions; and

o  The defeat of any non-negotiated takeover attempt that might
        otherwise benefit the public stockholders.

Anti-takeover provisions in  our charter  documents and  under  Delaware law may
make an acquisition of us,  which  may  be  beneficial to our stockholders, more
difficult.

     We are  incorporated  in  Delaware.  Certain  anti-takeover  provisions  of
Delaware law and our charter  documents as currently in effect may make a change
in control of our company more  difficult,  even if a change in control would be
beneficial to the stockholders.  Our anti-takeover provisions include provisions
in the certificate of incorporation  providing that  stockholders'  meetings may
only be called by the board of directors and a provision in the bylaws providing
that the stockholders may not take action by written consent.  Additionally, our
board of  directors  has the  authority to issue  1,000,000  shares of preferred
stock and to determine  the terms of those  shares of stock  without any further
action by the  stockholders.  The  rights of  holders  of our  common  stock are
subject to the rights of the holders of any preferred  stock that may be issued.
The issuance of preferred  stock could make it more  difficult for a third party
to  acquire a  majority  of our  outstanding  voting  stock.  Delaware  law also
prohibits  corporations from engaging in a business combination with any holders
of 15% or more of their  capital  stock  until the holder has held the stock for
three years unless, among other  possibilities,  the board of directors approves
the  transaction.  Our board of directors  may use these  provisions  to prevent
changes in the management  and control of our company.  Also,  under  applicable
Delaware law, our board of directors may adopt additional anti-takeover measures
in the future.

                                       15

                                 USE OF PROCEEDS

     We will not receive any of the proceeds from the sale of the shares offered
and sold for the accounts of the selling stockholders.  In order for the selling
stockholders to sell 752,427 shares of common stock offered for sale pursuant to
this  prospectus,  they must exercise  outstanding  warrants for the purchase of
common stock. If all of those warrants are exercised,  we will receive  proceeds
of $9,776,494.  Since we do not have any control over when or to what extent the
warrants will be exercised, management intends to use any proceeds received upon
exercise for working capital and general corporate  purposes.  Since we have not
made  any  specific  allocation  for any  proceeds,  our  management  will  have
significant flexibility in applying such proceeds.

     The selling stockholders will not pay any of the expenses that are incurred
in  connection  with the  registration  of the  shares,  but  they  will pay all
commissions,  discounts  and any other  compensation  to any  securities  broker
dealers through whom they sell any of the shares.

                              SELLING STOCKHOLDERS

     The following table sets forth the names of each selling  stockholder,  the
aggregate  number of shares of common stock  beneficially  owned by each selling
stockholder  as of May 18, 2001,  and the  aggregate  number of shares of common
stock  that  each  selling  stockholder  may  offer  and sell  pursuant  to this
prospectus.  Because each selling  stockholder may offer all or a portion of the
shares of common stock  offered by this  prospectus at any time and from time to
time after the date hereof, no estimate can be made of the number of shares that
each selling  stockholder may retain upon completion of this offering.  However,
assuming all of the shares  offered by this  prospectus  are sold by the selling
stockholders  then,  unless otherwise noted,  after completion of this offering,
none of the selling stockholders will own more than one percent of the shares of
common stock outstanding.

     Of the  5,621,960  shares  of  common  stock  offered  by this  prospectus,
4,869,533  shares are  issued and  outstanding  as of May 17,  2001 and  752,427
shares have been  reserved for issuance by us to the selling  stockholders  upon
the exercise of outstanding common stock warrants. We are registering all of the
shares of common stock offered for sale pursuant to this  prospectus as required
by certain registration rights obligations.

     In  the  following  table,  we  have  calculated  shares  of  common  stock
beneficially  owned  based  upon  42,026,259  shares of common stock outstanding
on May 17, 2001, together with options, warrants or other convertible securities
that  are  exercisable  within  60  days  of  May  17,  2001  for  each  selling
stockholder.  Under  the  rules  of  the  Securities  and  Exchange  Commission,
beneficial ownership includes shares over which the named stockholder  exercises
voting and/or  investment  power.  Unless  otherwise  indicated in the footnotes
below,  we believe  that the persons and  entities  named in the table have sole
voting and  investment  power with  respect  to all shares  beneficially  owned,
subject to applicable  community  property laws. The information with respect to
beneficial  ownership  of common  stock held by each person is based upon record
ownership  data  provided  by our  transfer  agent,  information  as supplied or
confirmed  by  selling  stockholders,  based  upon  statements  filed  with  the
Securities and Exchange  Commission or based upon our actual knowledge.  None of
the selling  stockholders  will own one percent or more of the our common  stock
after completion of this offering.

     Except as noted in the footnotes to the table below,  within the past three
years, none of the selling stockholders have held any position or office with us
or entered into a material relationship with us.

     Except as noted in the  footnotes to the table  below,  none of the selling
stockholders  will own 1% or more of our common stock after  completion  of this
offering.

                                       16

                                            Number of Shares
                                             Beneficially      Number of Shares
                                             Owned Prior to       Offered
 Name                                          Offering            Hereby
 ----                                     ----------------         ------
 BayStar Capital LP                            162,258             162,258
 BayStar International Ltd.                     81,129              81,129
 equityfourlife (Bahamas) Ltd. (1)             730,159             730,159
 Perceptive Life Sciences Fund LP              121,694             121,694
 MPM BioEquities Master Fund LP (2)            486,773             486,773
 Pequot Scout Fund L.P.                        158,202             158,202
 Pequot Navigator Offshore Fund, Inc.           85,186              85,186
 Caduceus Capital Trust                        419,750             419,750
 Caduceus Capital II, LP                       235,750             235,750
 PW Eucalyptus Fund, L.L.C.                    511,750             511,750
 PW Eucalyptus Fund, Ltd                        51,750              51,750
 Franklin California Growth Fund-Class A     1,095,238           1,095,238
 Franklin Biotechnology Discovery Fund         730,159             730,159
 Orbitex Health & Biotechnology Fund           316,402             316,402
 Orbitex Life Science & Biotechnology Fund      36,509              36,509
 Monument Medical Science Fund                 133,863             133,863
 Ursus Capital L.P.                             95,651              95,651
 Ursus Offshore Ltd.                            26,043              26,043
 Biotech Value Plus Ltd.                       121,694             121,694
 SCO Securities LLC (3)                         32,000              22,000


(1)  Eric  Sager,  one of our  directors,  serves  on the board of  advisors  of
     equity4life.  Through his interest in the fund manager of equity4life,  Mr.
     Sager is indirectly entitled to 3% of the profits of equity4life.

(2)  MPM Capital L.P. is the  investment  manager of BB  BioVentures  L.P.,  MPM
     Asset  Management 1998 Investors  L.L.C.and MPM  BioVentures  Parallel Fund
     L.P. which  currently hold 2,725,787  shares (not including the shares held
     by MPM  BioEquities  Master  Fund L.P.) or 6.5% of our  outstanding  Common
     Stock in the aggregate,  and MPM  BioEquities  Master Fund L.P., one of the
     selling  stockholders.  As investment manager, MPM Capital L.P. is entitled
     to receive a  performance  fee of 20% of the  profits  from each fund.  Mr.
     Ansbert Gadicke, one of our directors,  is a general partner of MPM Capital
     L.P. and, as such, is indirectly  entitled to a significant portion of this
     performance fee.

(3)  We entered into an agreement dated November 20, 2000,  which was amended in
     May 2001  with  SmallCaps  OnLine,  LLC (now  known as SCO  Securities  LLC
     ("SCO"))  for  the  providing  of  investment  advisory  services,  and SCO
     provided such services to us in connection  with the  transactions in which
     the shares  offered for sale  pursuant to this  prospectus  initially  were
     sold.  Pursuant  to  this  arrangement,  we  are  obligated  to  pay  SCO a
     commission of 1% of the gross proceeds received by us in such transactions,
     subject to certain specified  exceptions  including proceeds received by us
     from our affiliates,  SCO is to receive an additional  commission of .5% on
     the gross proceeds  received by us from Caduceus  Capital  Trust,  Caduceus
     Capital II, L.P., PW Eucalyptus Fund, LLC and PW Eucalyptus Fund, Ltd., and
     we issued  warrants  for 22,000  shares of our common stock to SCO. We also
     entered into an  agreement  with SCO dated  January 16,  2001,  pursuant to
     which SCO provides  advisory services with respect to corporate finance and
     investor  relations  matters.  In connection with this arrangement,  we are
     obligated  to pay SCO $6,000 per month (a portion of which may be  credited
     against the fee payable to SCO under our other  agreement with SCO), and we
     issued to SCO an option to purchase  10,000 shares of our common stock with
     a term of five years and subject to such  limitations  and  restrictions as
     are applicable to options issued under our employee stock option plan. Both
     of our agreements with SCO are terminable on 30 days notice.  Under both of
     these  agreements,  we  are  obligated  to  reimburse  SCO  for  reasonable
     out-of-pocket  expenses incurred by SCO in connection with the providing of
     services  under these  agreements  and to indemnify SCO from all losses and
     liabilities   arising  out  of  the  transactions   contemplated  by  these
     agreements,  except for losses which result  primarily from SCO's bad faith
     or gross negligence.


                                       17







                              Plan of Distribution

     We are  registering  the shares of common  stock  offered  for sale by this
prospectus  on  behalf of the  selling  stockholders.  As used in this  section,
"selling stockholders" includes donees, pledgees,  distributees,  transferees or
other  successors-in-interest,  including,  without limitation, their respective
affiliates,  members and limited or general partners,  all of which are referred
to as a group below as  transferees,  or certain  counterparties  to  derivative
transactions  with  the  selling   stockholders  or  transferees.   The  selling
stockholders  will act  independently  of us in making decisions with respect to
the timing,  manner and size of each sale.  We will pay all costs,  expenses and
fees in connection with the registration of the shares. The selling stockholders
will  pay  all  brokerage  commissions,   underwriting  discounts,  commissions,
transfer taxes and other similar selling expenses,  if any,  associated with the
sale of the shares of common stock by them.

     An aggregate of 4,869,533  shares of common stock was originally  issued to
and  purchased  by certain of the selling  stockholders  at a price of $9.45 per
share in a  private  placement  on May 16,  2001  and on May 17,  2001  and,  in
connection  therewith,  warrants representing a total of up to 730,427 shares of
common  stock at an  exercise  price of $13.10  per share  were  issued to these
selling  stockholders.  All of these shares of common  stock and  warrants  were
issued and sold pursuant to an exemption from the  registration  requirements of
the Securities Act as provided by Rule 506 of Regulation D promulgated under the
Securities  Act. In addition,  the Company issued warrants  representing  22,000
shares of common  stock at an  exercise  price of $9.45  per share  pursuant  to
Section  4(2) of the  Securities  Act to one of the  selling  stockholders,  SCO
Securities  LLC, as  compensation  for  services  as a financial  advisor to the
Company.  The  Company  also is  obligated  to pay SCO  Securities  LLC a fee as
compensation  for services as a financial  advisor to the Company (see  "SELLING
STOCKHOLDERS".)  All warrants issued by the Company  terminate on the earlier of
three years from the date of issuance or the closing of a merger or  acquisition
which results in a change of control of the Company.

     Shares of common stock may be sold by the selling stockholders from time to
time in one or more types of transactions (which may include block transactions)
on NASDAQ or on any other market on which our common stock may from time to time
be  trading,   in  the   over-the-counter   market,   in  privately   negotiated
transactions,  through put or call options transactions  relating to the shares,
through short sales of such shares, or a combination of such methods of sale, at
market prices  prevailing  at the time of sale,  fixed  prices,  varying  prices
determined at the time of sale or at negotiated prices. The selling stockholders
will have the sole  discretion not to accept any purchase offer or make any sale
of shares if they deem the purchase price to be unsatisfactory at any particular
time. Such  transactions may or may not involve brokers or dealers.  To the best
of our  knowledge,  none of the  selling  stockholders  have  entered  into  any
agreements,   understandings   or   arrangements   with  any   underwriters   or
broker-dealers  regarding  the  sale  of  their  securities,  nor  is  there  an
underwriter or  coordinating  broker acting in connection with the proposed sale
of shares of common  stock  offered by this  prospectus;  however,  the  selling
stockholders may enter into agreements,  understandings  or arrangements with an
underwriter or broker-dealer regarding the sale of their shares in the future.

     The selling  stockholders may effect such transactions by selling shares of
common stock directly to purchasers or to or through  broker-dealers,  which may
act as agents or  principals,  or other  agents.  Such  broker-dealers  or other
agents  may  receive  compensation  in the form of  discounts,  concessions,  or
commissions  from the selling  stockholders  and/or the  purchasers of shares of
common stock for whom such  broker-dealers  or other agents may act as agents or
to whom they sell as principal,  or both (which  compensation as to a particular
broker-dealer  or other  agent  might be in  excess of  customary  commissions).
Market makers and block  purchasers  purchasing  the shares will do so for their
own account and at their own risk.  It is  possible  that a selling  stockholder
will attempt to sell shares of common stock  in  block  transactions  to  market

                                       18

makers  or  other  purchasers  at  a price per share which may be below the then
market  price.  There  can be no  assurance  that all or any part of the  shares
offered hereby will be sold by the selling stockholders.

     The  selling   stockholders  may  enter  into  hedging   transactions  with
broker-dealers  or other financial  institutions  with respect to the shares. In
connection   with  these   transactions,   broker-dealers   or  other  financial
institutions  may  engage in short  sales of the shares in the course of hedging
the positions they assume with the selling stockholders.  Subject to contractual
restrictions  applicable  to  most,  but not  all  selling  stockholders,  which
restrictions expire on June 15, 2001, the selling stockholders may also sell the
shares  short and  redeliver  the shares to close out the short  positions.  The
selling  stockholders  may also enter  into  option or other  transactions  with
broker-dealers or other financial institutions which require the delivery to the
broker-dealer  or  other  financial  institutions  of the  shares.  The  selling
stockholders may also loan or pledge the shares to a financial  institution or a
broker-dealer  and the financial  institution or the  broker-dealer may sell the
shares loaned or upon a default the financial  institution or the  broker-dealer
may effect sales of the pledged shares.

     The  selling   stockholders  and  any  brokers,   dealers  or  agents  that
participate  in  connection  with the sale of shares of  common  stock  might be
deemed to be  "underwriters"  within the meaning of the  Securities  Act of 1933
(the "Securities Act"), and any commissions received by such brokers, dealers or
agents and any profit on the resale of the shares  sold by them while  acting as
principals might be deemed to be underwriting discounts or commissions under the
Securities  Act. We have agreed to indemnify  the selling  stockholders  against
certain liabilities, including liabilities arising under the Securities Act. The
selling stockholders may agree to indemnify any agent, dealer,  broker-dealer or
underwriter that  participates in transactions  involving sales of the shares of
common stock offered  pursuant to this prospectus  against certain  liabilities,
including liabilities arising under the Securities Act.

     Because the selling stockholders may be deemed to be "underwriters"  within
the meaning of the Securities Act, the selling  stockholders  will be subject to
the  prospectus  delivery  requirements  of the  Securities  Act and  the  rules
promulgated  thereunder and they may be subject to certain statutory liabilities
under the Securities Act, including,  but not limited to, Sections 11, 12 and 17
of the  Securities  Act and Rule 10b-5  under the  Securities  Exchange  Act. In
addition,  the selling  stockholders  and any other person  participating in the
offering will be subject to applicable provisions of the Securities Exchange Act
and the rules  and  regulations  thereunder,  including  Regulation  M under the
Securities  Exchange  Act,  which may limit the timing of  purchases  and sales.
These  restrictions  may affect the  marketability  of the common  stock and the
ability of any person to engage in market-making  activities with respect to the
common stock.

     Commencing  on May 16,  2002  (May 17,  2002,  in the  case of one  selling
stockholder),  some of the shares of common stock covered by this prospectus may
qualify for resale pursuant to Rule 144 under the Securities Act and such shares
may be sold under Rule 144 rather  than under the terms of this  prospectus.  In
addition, subject to applicable state and foreign laws, the selling stockholders
may sell their common stock outside the United States  pursuant to Rules 903 and
904 of Regulation S under the Securities Act.

     To comply with the securities laws of certain jurisdictions,  the shares of
common  stock  offered  by this  prospectus  may need to be offered or sold only
through  registered  or licensed  brokers or dealers.  In  addition,  in certain
jurisdictions, the shares of common stock may not be offered or sold unless they
have been  registered  or qualified  for sale or an  exemption is available  and
complied with.

     If a selling stockholder notifies us that any material arrangement has been
entered into with a broker-dealer for the sale of shares of common stock through
a block trade, special offering, exchange distribution or secondary distribution
or a purchase by a broker,  dealer or underwriter,  we will file a supplement to
this prospectus, if required,  pursuant to Rule 424(b) under the Securities Act.
In addition, to the extent required, we will amend or supplement this prospectus
to disclose other material arrangements regarding the plan of distribution.

                                       19

                                  LEGAL MATTERS

     For the purpose of this offering,  Paul,  Hastings,  Janofsky & Walker LLP,
Los Angeles,  California is giving an opinion of the validity of the issuance of
the securities offered in this prospectus.


                                     EXPERTS

     The financial statements included in our Annual Report on Form 10-K for the
year ended December 31, 2000,  incorporated  by reference in this prospectus and
elsewhere in the  registration  statement  have been audited by Arthur  Andersen
LLP,  independent  public  accountants,  as  indicated in their  report(s)  with
respect thereto,  and are included herein in reliance upon the authority of said
firm as experts in giving said reports.

                                       20







                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The  following  table sets forth the costs and  expenses  to be paid by the
registrant in connection with the sale of the common stock being registered:

Securities and Exchange Commission registration fee...........$14,821.00
Legal fees and expenses.......................................$40,000.00
Accountants' fees and expenses................................$ 6,000.00
Miscellaneous.................................................$10,000.00
                                                              ----------
Total.........................................................$70,821.00
                                                              ==========

     The foregoing  items,  except for the  Securities  and Exchange  Commission
registration fee, are estimated.

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Reference is made to the Amended and Restated  Certificate of Incorporation
with the Registrant;  the Bylaws of the Registrant;  Section 145 of the Delaware
General  Corporation  Law;  which,  among other  things,  and subject to certain
conditions,  authorize the Registrant to indemnify, or indemnify by their terms,
as the case may be, the directors and officers of the Registrant against certain
liabilities and expenses incurred by such persons in connection with claims made
by reason of their being such a director or officer. Pursuant to this authority,
the Registrant has entered into an indemnification  agreement with each director
and  executive  officer,   whereby  the  Registrant  has  agreed  to  cover  the
indemnification obligations.

     The  Registrant  maintains  directors'  and officers'  insurance  providing
indemnification  against  certain  liabilities  for certain of the  Registrant's
directors, officers, affiliates, partners or employees.

     The  indemnification   provisions  in  the  Registrant's  Bylaws,  and  the
indemnification agreements entered into between the Registrant and its directors
and executive officers,  may be sufficiently broad to permit  indemnification of
the Registrant's officers and directors for liabilities arising under the Act.

     Reference is made to the following documents incorporated by reference into
this  Registration  Statement  regarding  relevant  indemnification   provisions
described above and elsewhere herein:  (1) the Amended and Restated  Certificate
of  Incorporation,  filed as Exhibit  3.1B to  Registrant's  Amendment  No. 2 to
Registration  Statement  on Form S-1  filed  with the  Securities  and  Exchange
Commission on July 6, 1999; (2) the Registrant's  Bylaws filed as Exhibit 3.1 to
Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2001,
and (3) the form of  Indemnification  Agreement  entered into by the  Registrant
with each of its  directors  and  executive  officers  filed as Exhibit  10.1 to
Registrant's  Registration  Statement on Form S-1 filed with the  Securities and
Exchange  Commission on May 4, 1999,  each  incorporated  by reference into this
Registration Statement.






ITEM 16.  EXHIBITS


Exhibit
Number                      Description of Document
- -------- -----------------------------------------------------------------------
   4*     Form of  Warrant,  with  attached  schedule  of warrant holders,  each
          dated as of May 16,  2001  except  for the  warrant  issued to Biotech
          Value Plus Ltd.,  which is dated May 17,  2001,  each  warrant with an
          exercise  price of $13.10 per share  except for the warrant  issued to
          SCO Securities LLC with an exercise price of $9.45 per share.

  5.1*    Opinion of Paul, Hastings, Janofsky & Walker LLP.

 10.1     Common  Stock  Purchase   Agreement  between  BioMarin  Pharmaceutical
          Inc. and Acqua  Wellington  North American  Equities Fund Ltd.,  dated
          January 26, 2001,  previously  filed as Exhibit 10.2 to the  Company's
          Registration Statement on Form S-3, Registration No. 333-48800,  which
          is incorporated herein by reference.

 10.2      Securities  Purchase   Agreement   between   BioMarin  Pharmaceutical
          Inc. and the investors named therein,  dated May 16, 2001,  previously
          filed as Exhibit 10.1 to the Company's  Current  Report on Form 8-K as
          filed May 18, 2001, which is incorporated herein by reference.

 10.3     Securities   Purchase   Agreement   between   BioMarin  Pharmaceutical
          Inc. and the investor  named therein,  dated May 17, 2001,  previously
          filed as Exhibit 10.2 to the Company's  Current  Report on Form 8-K as
          filed May 18, 2001, which is incorporated herein by reference.

 10.4*    Letter    Agreement   between   BioMarin   Pharmaceutical   Inc.   and
          SmallCaps Online Group LLC (now SCO Securities LLC) dated November 20,
          2000, as amended, regarding financial advisory services.

 10.5*    Letter    Agreement   between   BioMarin   Pharmaceutical   Inc.   and
          SmallCaps  Online Group LLC (now SCO Securities LLC) dated January 16,
          2001, regarding investor relations services.

  23.1*   Consent  of  Paul,  Hastings,   Janofsky  &  Walker LLP (Included with
          5.1).

  23.2*   Consent of Arthur Andersen LLP.

  24.1*   Power of Attorney (Included with signature page).

- ------------------

*........Filed herewith


ITEM 17.  UNDERTAKINGS

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933, may be permitted to directors, officers, and controlling persons of the
Registrant  pursuant to the  provisions  described in Item 15 or otherwise,  the
Registrant  has been advised that in the opinion of the  Securities and Exchange
Commission,  such  indemnification  is against public policy as expressed in the
Act,  and  is,  therefore,   unenforceable.  In  the  event  that  a  claim  for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
Registrant of expenses incurred or paid by a director,  officer,  or controlling
person of the  Registrant  in the  successful  defense  of any action  suit,  or
proceeding) is asserted by such  director,  officer,  or  controlling  person in
connection with the securities being registered,  the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against public policy as expressed in the Act and will
be governed by the final adjudication of such issue.

     The undersigned Registrant hereby undertakes:

                                       2


     (1) To file,  during  any  period in which  offers or sales are being  made
pursuant to this registration statement:  (i) to include any prospectus required
by  Section  10(a)(3)  of the  Securities  Act of 1933;  (ii) to  reflect in the
prospectus  any  facts  or  events  arising  after  the  effective  date  of the
registration  statement (or the most recent  post-effective  amendment  thereof)
which,  individually or in the aggregate,  represent a fundamental change in the
information  set  forth  in  the  registration  statement.  Notwithstanding  the
foregoing,  any  increase or decrease  in volume of  securities  offered (if the
total  dollar  value of  securities  offered  would not  exceed  that  which was
registered) and any deviation from the low or high end of the estimated  maximum
offering  range  may be  reflected  in the  form of  prospectus  filed  with the
Commission  pursuant to Rule 424(b) if, in the aggregate,  the changes in volume
and price  represent no more than a 20 percent  change in the maximum  aggregate
offering price set forth in the  "Calculation of Registration  Fee" table in the
effective registration statement; (iii) to include any material information with
respect  to the  distribution  not  previously  disclosed  in  the  registration
statement  or any  material  change  to  such  information  in the  registration
statement;

     (2) That, for the purpose of determining any liability under the Securities
Act of 1933,  each  such  post-effective  amendment  shall be deemed to be a new
registration  statement  relating to the  securities  offered  therein,  and the
offering of such  securities at that time shall be deemed to be the initial bona
fide offering thereof; and

     (3) To remove from registration by means of a post-effective  amendment any
of the securities being registered which remain unsold at the termination of the
offering.

     The  undersigned   Registrant  hereby  undertakes  that,  for  purposes  of
determining  any liability  under the Securities Act of 1933, each filing of the
Registrant's  annual  report  pursuant to section  13(a) or section 15(d) of the
Securities  Exchange  Act of  1934  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     The undersigned  Registrant undertakes that: (1) for purpose of determining
any liability under the Securities Act of 1933, the information omitted from the
form of prospectus filed as part of the registration  statement in reliance upon
Rule 430A and contained in a form of prospectus filed by the Registrant pursuant
to Rule 424(b) (1) or (4) or 497(h) under the  Securities Act shall be deemed to
be part of the registration  statement as of the time it was declared effective;
and (2) for the purpose of determining any liability under the Securities Act of
1933, each post-effective  amendment that contains a form of prospectus shall be
deemed to be a new  registration  statement  relating to the securities  offered
therein,  and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

                                       3




                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized  in the City of Novato,  State of  California,  this 18th day of May,
2001.

                           BIOMARIN PHARMACEUTICAL INC.


                           By:      /s/ Fredric D. Price
                           ----------------------------------------
                           Fredric D. Price
                           Chairman, Chief Executive Officer and
                           Director (Principal Executive Officer)

                                POWER OF ATTORNEY

     KNOW ALL  PERSONS  BY THESE  PRESENTS,  that each  person  whose  signature
appears below  constitutes and appoints Fredric D. Price and Raymond W. Anderson
as such persons' true and lawful  attorneys-in-fact  and agents, with full power
of substitution and  resubstitution,  for such person and in such person's name,
place  and  stead,  in any and all  capacities,  to sign any and all  amendments
(including  post-effective  amendments) to this Registration  Statement,  and to
file the same,  with all exhibits  thereto,  and other  documents in  connection
therewith,  with the Securities and Exchange Commission and any other regulatory
authority,  granting  unto said  attorneys-in-fact  and  agents,  full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in connection therewith, as fully to all intents and purposes as such
person might or could do in person,  hereby  ratifying and  confirming  all that
said  attorneys-in-fact  and agents, or such persons' substitute or substitutes,
may lawfully do or cause to be done by virtue hereof.

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement on Form S-3 has been signed by the following  persons in
the capacities and on the dates indicated:



Signature                                            Title                                     Date
                                                                                       

/s/ Fredric D. Price          Chairman, Chief Executive Officer and Director                 May 18, 2001
- -------------------------         (Principal Executive Officer)
Fredric D. Price

/s/ Raymond W. Anderson       Chief Financial Officer, Chief Operating Officer,              May 18, 2001
- --------------------------          Secretary, and Vice President Finance and
Raymond W. Anderson                 Administration (Principal Financial and
                                    Accounting Officer)


/s/ Grant W. Denison, Jr.     Director                                                       May 18, 2001
- ---------------------------
Grant W. Denison, Jr.

/s/ Ansbert S. Gadicke, M.D.  Director                                                       May 18, 2001
- ----------------------------
Ansbert S. Gadicke, M.D.

/s/  Erich Sager              Director                                                       May 18, 2001
- ----------------------------
Erich Sager

/s/ Gwynn R. Williams         Director                                                       May 18, 2001
- ----------------------------
Gwynn R. Williams



                                       4




                                  Exhibit Index

Exhibit
Number                      Description of Document
- -------- -----------------------------------------------------------------------
   4*     Form of  Warrant,  with  attached  schedule  of warrant holders,  each
          dated as of May 16,  2001  except  for the  warrant  issued to Biotech
          Value Plus Ltd.,  which is dated May 17,  2001,  each  warrant with an
          exercise  price of $13.10 per share  except for the warrant  issued to
          SCO Securities LLC with an exercise price of $9.45 per share.

  5.1*    Opinion of Paul, Hastings, Janofsky & Walker LLP.

 10.1     Common  Stock  Purchase   Agreement  between  BioMarin  Pharmaceutical
          Inc. and Acqua  Wellington  North American  Equities Fund Ltd.,  dated
          January 26, 2001,  previously  filed as Exhibit 10.2 to the  Company's
          Registration Statement on Form S-3, Registration No. 333-48800,  which
          is incorporated herein by reference.

 10.2      Securities  Purchase   Agreement   between   BioMarin  Pharmaceutical
          Inc. and the investors named therein,  dated May 16, 2001,  previously
          filed as Exhibit 10.1 to the Company's  Current  Report on Form 8-K as
          filed May 18, 2001, which is incorporated herein by reference.

 10.3     Securities   Purchase   Agreement   between   BioMarin  Pharmaceutical
          Inc. and the investor  named therein,  dated May 17, 2001,  previously
          filed as Exhibit 10.2 to the Company's  Current  Report on Form 8-K as
          filed May 18, 2001, which is incorporated herein by reference.

 10.4*    Letter    Agreement   between   BioMarin   Pharmaceutical   Inc.   and
          SmallCaps Online Group LLC (now SCO Securities LLC) dated November 20,
          2000, as amended, regarding financial advisory services.

 10.5*    Letter    Agreement   between   BioMarin   Pharmaceutical   Inc.   and
          SmallCaps  Online Group LLC (now SCO Securities LLC) dated January 16,
          2001, regarding investor relations services.

  23.1*   Consent  of  Paul,  Hastings,   Janofsky  &  Walker LLP (Included with
          5.1).

  23.2*   Consent of Arthur Andersen LLP.

  24.1*   Power of Attorney (Included with signature page).

- ------------------

*........Filed herewith


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