SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM 10-Q

[x] Quarterly report pursuant to Section 13 or 15(d) of the Securities and
    Exchange Act of 1934
    For the quarterly period ended March 31, 1998
                                        OR
[ ] Transition report pursuant to Section 13 or 15(d) of the Securities and 
    Exchange Act of 1934
    For the transition period from to


                        Commission File Number 000-19319

                       Vertex Pharmaceuticals Incorporated
             (Exact name of registrant as specified in its charter)


       Massachusetts                                        04-3039129
(State or other jurisdiction                              (I.R.S. Employer
incorporation or organization)                            Identification No.)


                   130 Waverly Street, Cambridge, 02139-4242
          (Address of principal executive offices, including zip code)


                                 (617) 577-6000
              (Registrant's telephone number, including area code)


    Indicate by check mark whether the registrant (1) has filed all reports 
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 
1934 during the preceding 12 months (or for such shorter period that the 
registrant was required to file such reports), and (2) has been subject to 
such filing requirements for the past 90 days.

                               YES   X    NO 
                                   -----     -----

    Indicate the number of shares outstanding of each of the issuer's classes 
of common stock, as of the latest practicable date.

Common Stock, par value $.01 per share                     25,288,904
          Class                                      Outstanding at May 6, 1998


                                       1



                       VERTEX PHARMACEUTICALS INCORPORATED

                                      INDEX





                                                                          Page

                                                                       
Part I. -  Financial Information
  Item 1.   Condensed Consolidated Financial Statements

              Report of Independent Accountants                            3

              Condensed Consolidated Balance Sheets -
                       March 31, 1998 and December 31, 1997                4

              Condensed Consolidated Statements of Operations -
                       Three Months Ended March 31, 1998 and 1997          5

              Condensed Consolidated Statements of Cash Flows -
                       Three Months Ended March 31, 1998 and 1997          6

              Notes to Condensed Financial Statements                      7

  Item 2.   Management's Discussion and Analysis of Financial
                       Condition and Results of Operations                 8


Part II. -  Other Information                                             11

Signatures                                                                12




                                       2


                        Report of Independent Accountants

To the Board of Directors and Stockholders of Vertex Pharmaceuticals
Incorporated:

We have reviewed the condensed consolidated balance sheet of Vertex 
Pharmaceuticals Incorporated as of March 31, 1998, and the related condensed 
consolidated statements of income and cash flows for the three month periods 
ended March 31, 1998 and 1997. These financial statements are the 
responsibility of the company's management.

We conducted our review in accordance with standards established by the 
American Institute of Certified Public Accountants. A review of interim 
financial information consists principally of applying analytical procedures 
to financial data and making inquiries of persons responsible for financial 
and accounting matters. It is substantially less in scope than an audit 
conducted in accordance with generally accepted auditing standards, the 
objective of which is the expression of an opinion regarding the financial 
statements taken as a whole. Accordingly, we do not express such an opinion.

Based on our review, we are not aware of any material modifications that 
should be made to the condensed consolidated financial statements referred to 
above for them to be in conformity with generally accepted accounting 
principles.

We have previously audited, in accordance with generally accepted auditing 
standards, the consolidated balance sheet as of December 31, 1997, and the 
related consolidated statements of income, retained earnings, and cash flows 
for the year then ended (not presented herein); and in our report dated 
February 23, 1998, we expressed an unqualified opinion on those consolidated 
financial statements. In our opinion, the information set forth in the 
accompanying condensed consolidated balance sheet as of December 31, 1997, is 
fairly stated, in all material respects, in relation to the consolidated 
balance sheet from which it has been derived.

Coopers & Lybrand L.L.P.

Boston, Massachusetts
April 22, 1998


                                       3



                       VERTEX PHARMACEUTICALS INCORPORATED

                      CONDENSED CONSOLIDATED BALANCE SHEETS

                                 (In thousands)




                                                      March 31,     December 31,
                                                         1998            1997
                                                      ---------     ------------
                                                     (Unaudited)

                                    ASSETS
                                                               
Current assets:
      Cash and cash equivalents                       $  58,446      $  71,454
      Short-term investments                            207,428        208,217
      Prepaid expenses and other current assets           1,662          1,952
                                                      ---------      ---------

           Total current assets                         267,536        281,623

Restricted cash                                           2,316          2,316
Property and equipment, net                              12,381         11,095
Other assets                                              1,113            570
                                                      ---------      ---------

      Total assets                                    $ 283,346      $ 295,604
                                                      ---------      ---------
                                                      ---------      ---------


                     LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
   Obligations under capital lease and debt           $   2,537      $   2,510
   Accounts payable and accrued expenses                  6,174         10,632
   Deferred revenue                                        --              556
                                                      ---------      ---------

   Total current liabilities                              8,711         13,698
                                                      ---------      ---------

Obligations under capital leases and debt,
     excluding current portion                            6,209          5,905
                                                      ---------      ---------

     Total liabilities                                   14,920         19,603
                                                      ---------      ---------

Stockholders' equity:
     Common stock                                           253            252
     Additional paid-in capital                         393,312        392,372
     Accumulated other comprehensive income                  50            152
     Accumulated deficit                               (125,189)      (116,775)
                                                      ---------      ---------

     Total stockholders' equity                         268,426        276,001
                                                      ---------      ---------
     Total liabilities and stockholders' equity       $ 283,346      $ 295,604
                                                      ---------      ---------
                                                      ---------      ---------




                 The accompanying notes are an integral part of
               these condensed consolidated financial statements.


                                       4



                       VERTEX PHARMACEUTICALS INCORPORATED

                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Unaudited)
                      (In thousands, except per share data)




                                                 Three Months Ended March 31,
                                                 ----------------------------
                                                      1998          1997
                                                      ----          ----
                                                            
Revenues:
   Collaborative and other research and development   $  3,173    $  4,660
   Interest income                                       3,996       2,258
                                                      --------    --------

       Total revenues                                    7,169       6,918
                                                      --------    --------

Costs and expenses:
   Research and development                             12,182      10,314
   General and administrative                            3,253       2,218
   Interest                                                148         152
                                                      --------    --------

       Total costs and expenses                         15,583      12,684
                                                      --------    --------

Net loss                                              $ (8,414)   $ (5,766)
                                                      --------    --------
                                                      --------    --------

Basic and diluted net loss per common share             $(0.33)     $(0.26)
                                                      --------    --------
                                                      --------    --------

Basic and diluted weighted average number of
  common shares outstanding                            25,250      21,975
                                                      --------    --------
                                                      --------    --------




                 The accompanying notes are an integral part of
               these condensed consolidated financial statements.


                                       5



                       VERTEX PHARMACEUTICALS INCORPORATED

                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
                                 (In thousands)




                                                    Three Months Ended March 31,
                                                    ----------------------------
                                                         1998           1997
                                                         ----           ----
                                                                    
Cash flows from operating activities:
     Net loss                                         $  (8,414)   $  (5,766)

     Adjustment to reconcile netloss to
      net cash used by operating activities:

          Depreciation and amortization                     932          814
     Changes in assets and liabilities:
          Prepaid expenses and other
            current assets                                  290          104
          Accounts payable and accrued
              expenses                                   (4,458)       2,116
          Deferred revenue                                 (556)        --
                                                      ---------    ---------

              Net cash provided (used) by
                     operating activities               (12,206)      (2,732)
                                                      ---------    ---------

 Cash flows from investing activities:
         Short-term investments                             686      (94,997)
         Expenditures for property and equipment         (2,218)      (2,260)
         Other assets                                      (543)         (75)
                                                      ---------    ---------
                  Net cash provided (used) by
                    investing activities                 (2,075)     (97,332)
                                                      ---------    ---------

Cash flows from financing activities:
      Proceeds from public offering of common stock        --        148,810
      Other issuances of common stock                       941        1,692
      Proceeds from equipment sale/leaseback              1,004          343
      Repayment of capital lease obligations               (673)        (698)
                                                      ---------    ---------
             Net cash provided (used) by
                 financing activities                     1,272      150,147
                                                      ---------    ---------

Effect of exchange rate changes on cash                       1           (7)
                                                      ---------    ---------

Increase (decrease) in cash and cash equivalents        (13,008)      50,076
Cash and cash equivalents at beginning of period         71,454       34,851
                                                      ---------    ---------

Cash and cash equivalents at end of period            $  58,446    $  84,927
                                                      ---------    ---------
                                                      ---------    ---------


                 The accompanying notes are an integral part of
               these condensed consolidated financial statements.


                                       6



                       VERTEX PHARMACEUTICALS INCORPORATED

                     NOTES TO CONDENSED FINANCIAL STATEMENTS


1.   Basis of Presentation

     The accompanying condensed consolidated financial statements are 
unaudited and have been prepared by the Company in accordance with generally 
accepted accounting principles.

     Certain information and footnote disclosures normally included in the 
Company's annual financial statements have been condensed or omitted. The 
interim financial statements, in the opinion of management, reflect all 
adjustments (including normal recurring accruals) necessary for a fair 
statement of the results for the interim periods ended March 31, 1998 and 
1997.

     The results of operations for the interim periods are not necessarily 
indicative of the results of operations to be expected for the fiscal year, 
although the Company expects to incur a substantial loss for the year ended 
December 31, 1998. These interim financial statements should be read in 
conjunction with the audited financial statements for the year ended December 
31, 1997, which are contained in the Company's 1997 Annual Report to its 
shareholders and in its Form 10-K filed with the Securities and Exchange 
Commission.

2.   Cash and Cash Equivalents

     For purposes of the statement of cash flows, the Company considers all 
highly liquid investments with maturities of three months or less at the date 
of purchase to be cash equivalents. Changes in cash and cash equivalents may 
be affected by shifts in investment portfolio maturities as well as by actual 
net cash receipts or disbursements.

3.   Basic and Diluted Loss per Common Share

     Basic earnings per share is based upon the weighted average number of 
common shares outstanding during the period. Diluted earnings per share is 
based upon the weighted average number of common shares outstanding during 
the period plus additional weighted average common equivalent shares 
outstanding during the period when the effect is not anti-dilutive. Common 
equivalent shares result from the assumed exercise of outstanding stock 
options, the proceeds of which are then assumed to have been used to 
repurchase outstanding stock using the treasury stock method. Common 
equivalent shares have not been included in the per share calculations as the 
effect would be anti-dilutive. Total potential common equivalents shares 
consist of 4,697,158 stock options outstanding with a weighted average 
exercise price of $22.24 as of March 31, 1998.


                                       7



                       VERTEX PHARMACEUTICALS INCORPORATED

                     NOTES TO CONDENSED FINANCIAL STATEMENTS


4.   Comprehensive Income

The Company has adopted SFAS No. 130, "Reporting Comprehensive Income", which 
requires that all components of comprehensive income and total comprehensive 
income be reported and that changes be shown in a financial statement 
displayed with the same prominence as other financial statements. The Company 
has elected to disclose this information in its statement of stockholders' 
equity. For the quarters ended March 31, 1998 and 1997 total comprehensive 
loss was as follows (in thousands):




                                             March 31, 1998    March 31, 1997
                                             --------------    --------------

                                                                 
Net loss                                         $(8,414)         $(5,766)
                                                                          
Other comprehensive income (loss):
Unrealized holding gains (losses) on investments    (103)            (348)
Foreign currency translation adjustment                1               (7)
                                                 -------          -------

Total other comprehensive income (loss)             (102)            (355)
                                                 -------          -------

Total comprehensive loss                         $(8,516)         $(6,121)
                                                 -------          -------
                                                 -------          -------




                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                       CONDITION AND RESULTS OF OPERATIONS

This discussion contains forward-looking statements which are subject to 
certain risks and uncertainties that can cause actual results to differ 
materially from those described. Factors that may cause such differences 
include but are not limited to those described in the section of the 
Company's annual report on Form 10-K entitled "Risk Factors." Readers are 
cautioned not to place undue reliance on these forward-looking statements 
which speak only as of the date hereof. The Company undertakes no obligation 
to publicly update or revise these forward-looking statements to reflect 
events or circumstances after the date hereof.

     Since its inception in 1989, the Company has been engaged in the 
discovery, development and commercialization of novel, small molecule 
pharmaceuticals for the treatment of major diseases for which there are 
currently limited or no effective treatments. The Company is a leader in the 
use of structure-based drug design, an approach to drug discovery that 
integrates advanced biology, biophysics and chemistry. The Company is 
conducting research and development programs to develop pharmaceuticals for 
the treatment of viral diseases, multidrug resistance in cancer, 
inflammation, immunosuppression and neurodegenerative disorders.

     To date, the Company has not received any revenues from the sale of 
pharmaceutical products. The Company's lead product candidate, amprenavir for 
the treatment of HIV infection, is presently undergoing Phase III clinical 
trials. If such clinical trials are concluded successfully and a New Drug 
Application is approved by the FDA and product sales, if any, commence, the 
Company will receive a royalty on sales of amprenavir by its partner Glaxo 
Wellcome plc ("Glaxo Wellcome"). However, there can be no assurance that 
Phase III clinical trials will be completed in a timely fashion, if at all, 
that 


                                       8



such trials will be successful, or that any approval will be granted by the 
FDA. The Company has incurred operating losses since its inception and 
expects to incur a loss in 1998. The Company believes that operating losses 
may continue for the next several years even if significant royalties are 
realized on amprenavir sales because the Company is planning to make 
significant investments in research and development for its other potential 
products. The Company expects that losses will fluctuate from quarter to 
quarter and that such fluctuations may be substantial.

Results of Operations

Three Months Ended March 31, 1998 Compared with Three Months Ended March 31, 
1997.

     The Company's total revenues increased to $7,169,000 in the first 
quarter of 1998 from $6,918,000 in the first quarter of 1997. In the first 
quarter of 1998, revenues consisted of $2,958,000 under the Company's 
collaborative agreements, $3,996,000 in investment income, and $215,000 in 
government grants and other income. In the first quarter of 1997, the Company 
received $4,237,000 in revenue from its collaborative agreements, $2,258,000 
in interest received on invested funds and $423,000 from government grants 
and other revenue. Total revenue in the first quarter of 1998 includes 
greater investment income from higher levels of cash and investment balances 
which offset lower collaborative revenues. Lower collaborative revenue during 
first quarter of 1998 as compared to the first quarter of 1997 was 
principally due to a $2,000,000 payment in the first quarter of 1997 from 
Kissei Pharmaceutical Co. Ltd. ("Kissei") associated with a clinical trial of 
amprenavir, Vertex's HIV protease inhibitor. In addition, the product 
research funding requirements under the HMR agreement ended on December 31, 
1997. This was partially offset by ongoing product research funding from 
agreements signed with Eli Lilly and Company in June 1998 and Kissei in 
September 1998.

     The Company's total costs and expenses increased to $15,583,000 in the 
first quarter of 1998 from $12,684,000 in the first quarter of 1997. Research 
and development expenses increased to $12,182,000 in the first quarter of 
1998 from $10,314,000 in the first quarter of 1997 principally due to the 
commencement of preclinical development activities for drug candidates in the 
ICE and Neurophilins programs as well as the continued expansion of the 
Company's core scientific staff. In addition, general and administrative 
expenses increased to $3,253,000 in the first quarter of 1998 from $2,218,000 
in the first quarter of 1997. The increase in general and administrative 
expense principally reflects the impact of personnel additions and an 
increase in marketing activities. Interest expense decreased to $148,000 in 
the first quarter of 1998 from $152,000 in the first quarter of 1997 due to 
lower interest rates on higher levels of equipment lease financing during the 
year. The Company expects that research and development as well as general 
and administrative expenses will continue to increase as the Company starts 
new research projects, advances current clinical and preclinical candidates, 
and expands its marketing and business development activities.

     The Company recorded a net loss of $8,414,000 or $0.33 per share in the 
first quarter of 1998 compared to a net loss of $5,766,000 or $0.26 per share 
in the first quarter of 1997.


                                       9



Liquidity and Capital Resources

     The Company's operations have been funded principally through strategic 
collaborative agreements, public offerings and private placements of the 
Company's equity securities, equipment lease financing, government grants and 
investment income. The Company expects to incur increased research and 
development and related supporting expenses and, consequently, may continue 
to experience losses on a quarterly and annual basis as it continues to 
develop existing and future compounds and to conduct clinical trials of 
potential drugs. The Company also expects to incur substantial administrative 
and commercialization expenditures in the future and additional expenses 
related to the filing, prosecution, defense and enforcement of patent and 
other intellectual property rights.

     The Company expects to finance these substantial cash needs with its 
existing cash and investments of approximately $266 million at March 31, 
1998, together with investment income earned thereon, future payments under 
its existing collaborative agreements, and facilities and equipment 
financing. To the extent that funds from these sources are not sufficient to 
fund the Company's activities, it will be necessary to raise additional funds 
through public offerings or private placements of securities or other methods 
of financing. There can be no assurance that such financing will be available 
on acceptable terms, if at all. The Company believes that its existing cash 
and investments should be sufficient to meet its anticipated requirements for 
at least the next two years.

     The Company's aggregate cash and investments decreased by $13,797,000 
during the three months ended March 31, 1998 to $265,874,000. Cash used by 
operations, principally to fund research and development activities, was 
$12,206,000 during the same period. In addition to the net loss of 
approximately $8,414,000, cash was used by operations to significantly 
decrease accounts payable and accrued expenses in the amount of $4,458,000 
which was related to development expenses incurred in 1997 for the Company's 
cancer MDR, autoimmune and inflammation projects. The Company also expended 
$2,218,000 during this period to acquire property and equipment, principally 
for research equipment and facilities. During the first quarter of 1998, the 
Company entered into equipment lease financing in the aggregate amount of 
$1,004,000 and repaid $673,000 of its lease obligations.

     The Company adopted requirements relating to comprehensive income in 
accordance with the Statement of Financial Accounting Standards No. 130 
("SFAS 130"), "Reporting Comprehensive Income". This Statement requires that 
total comprehensive income be reported and that changes be shown in a 
financial statement displayed with the same prominence as other financial 
statements.

     The Company is currently assessing the potential impact of the year 2000 
on the processing of date-sensitive information by the Company's computerized 
information systems and products purchased by the Company. The Company 
believes that its internal information systems are either year 2000 compliant 
or will be so prior to the year 2000 without incurring material costs. There 
can be no assurance, however, that the Company will not experience unexpected 
costs and delays in achieving year 2000 compliance for its internal 
information systems and current products, which could result in a material 
adverse effect on the Company's future results of operations.


                                       10



                                    PART II.

                                OTHER INFORMATION



Item 1.         Legal Proceedings:

                None

Item 2.         Changes in Securities:

                None

Item 3.         Defaults Upon Senior Securities:

                None

Item 4.         Submission of Matters to a Vote of Security Holders:

                None

Item 5.         Other Information:

                None

Item 6.         Exhibits:

                27   Financial Data Schedule. (Exhibit 27 is submitted as an
                     exhibit only in the electronic format of this Quarterly
                     Report on Form 10-Q submitted to the Securities and
                     Exchange Commission.)

                99   Letter of Independent Accountants

                     Reports on Form 8-K:

                     None


                                       11



                                   SIGNATURES


     Pursuant to the requirements of the Securities Exchange Act of 1934, the 
registrant has duly caused this report to be signed on its behalf by the 
undersigned thereunto duly authorized.

                                       VERTEX PHARMACEUTICALS INCORPORATED




Date:  May 13, 1998                    /s/Thomas G. Auchincloss. Jr
                                       ----------------------------
                                       Thomas G. Auchincloss, Jr.
                                       Vice President of Finance and Treasurer
                                       (Principal Financial Officer)



Date:  May 13, 1998                    /s/ Hans D. van Houte
                                       ---------------------
                                       Hans D. van Houte
                                       Controller
                                       (Principal Accounting Officer)


                                       12