WARRANT AGREEMENT dated as of ______, 1996 between HealthDesk
Corporation, a California corporation (the "Company"), and Whale Securities Co.,
L.P. (hereinafter referred to as the "Underwriter").

                              W I T N E S S E T H:

                  WHEREAS, the Company proposes to issue to the Underwriter
warrants (the "Warrants") to purchase up to 200,000 (as such number may be
adjusted from time to time pursuant to Article 8 of this Agreement) shares (the
"Shares") of common stock, no par value (the "Common Stock"), of the Company;
and

                  WHEREAS, the Underwriter has agreed, pursuant to the
underwriting agreement (the "Underwriting Agreement") dated ____________, 1996
between the Underwriter and the Company, to act as the underwriter in connection
with the Company's proposed public offering (the "Public Offering") of 2,000,000
shares of Common Stock (the "Public Shares") at an initial public offering price
of 5.00 per Public Share; and

                  WHEREAS, the Warrants issued pursuant to this Agreement are
being issued by the Company to the Underwriter or to its designees who are
officers and partners of the Underwriter or to members of the selling group
participating in the distribution of the Public Shares to the public in the
Public Offering and/or their respective directors, officers or partners
(collectively, the "Designees"), in consideration for, and as part of the









Underwriter's compensation in connection with, the Underwriter
acting as the Underwriter pursuant to the Underwriting Agreement;

                  NOW, THEREFORE, in consideration of the premises, the payment
by the Underwriter to the Company of TWO HUNDRED DOLLARS ($200.00), the
agreements herein set forth and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto
agree as follows:

                  1.       Grant.

                The Underwriter, and/or the Designees are hereby
granted the right to purchase, at any time from __________, 1997 [One year after
the Effective Date] until 5:00 P.M., New York time, on _______, 2001 (the
"Warrant Exercise Term"), up to 200,000 fully-paid and non-assessable Shares at
an initial exercise price (subject to adjustment as provided in Article 8
hereof) of $_____ per Share.

                  2.       Warrant Certificates.

                  The warrant certificates delivered and to be delivered
pursuant to this Agreement (the "Warrant Certificates") shall be in the form set
forth in Exhibit A attached hereto and made a part hereof, with such appropriate
insertions, omissions, substitutions and other variations as required or
permitted by this Agreement.

                  3.       Exercise of Warrant.

                           3.1. Cash Exercise. The Warrants initially are
exercisable at a price of $_____ per Share, payable in cash or by check to the
order of the Company, or any combination thereof, subject to adjustment as
provided in Article 8 hereof. Upon

                                       -2-








surrender of the Warrant Certificate with the annexed Form of Election to
Purchase duly executed, together with payment of the Exercise Price (as
hereinafter defined) for the Shares purchased, at the Company's principal
offices in California (currently located at 2560 Ninth Street, Suite 220,
Berkeley, California 94710) the registered holder of a Warrant Certificate
("Holder" or "Holders") shall be entitled to receive a certificate or
certificates for the Shares so purchased. The purchase rights represented by
each Warrant Certificate are exercisable at the option of the Holder hereof, in
whole or in part (but not as to fractional Shares). In the case of the purchase
of less than all the Shares purchasable under any Warrant Certificate, the
Company shall cancel said Warrant Certificate upon the surrender thereof and
shall execute and deliver a new Warrant Certificate of like tenor for the
balance of the Shares purchasable thereunder.

                           3.2. Cashless Exercise. At any time during the
Warrant Exercise Term, the Holder may, at the Holder's option, exchange, in
whole or in part, the Warrants represented by such Holder's Warrant Certificate
(a "Warrant Exchange"), into the number of Shares determined in accordance with
this Section 3.2, by surrendering such Warrant at the principal office of the
Company or at the office of its transfer agent, accompanied by a notice stating
such Holder's intent to effect such exchange, the number of Warrants to be so
exchanged and the date on which the Holder requests that such Warrant Exchange
occur (the "Notice of Exchange"). The Warrant Exchange shall take place on the
date specified in the Notice of Exchange or, if later, the date the

                                       -3-








Notice of Exchange is received by the Company (the "Exchange Date").
Certificates for the Shares issuable upon such Warrant Exchange and, if
applicable, a new Warrant Certificate of like tenor representing the Warrants
which were subject to the surrendered Warrant Certificate and not included in
the Warrant Exchange, shall be issued as of the Exchange Date and delivered to
the Holder within three (3) days following the Exchange Date. In connection with
any Warrant Exchange, the Holder shall be entitled to subscribe for and acquire
(i) the number of Shares (rounded to the next highest integer) which would, but
for the Warrant Exchange, then be issuable pursuant to the provision of Sections
3.1 above upon the exercise of the Warrants specified by the Holder in its
Notice of Exchange (the "Total Number") less (ii) the number of Shares equal to
the quotient obtained by dividing (a) the product of the Total Number and the
existing Exercise Price (as hereinafter defined) by (b) the Market Price (as
hereinafter defined) of a Public Share on the day preceding the Warrant
Exchange. "Market Price" at any date shall be deemed to be the last reported
sale price, or, in case no such reported sales takes place on such day, the
average of the last reported sale prices for the last three (3) trading days, in
either case as officially reported by the principal securities exchange on which
the Common Stock is listed or admitted to trading or as reported in the NASDAQ
National market System, or, if the Common Stock is not listed or admitted to
trading on any national securities exchange or quoted on the NASDAQ National
Market System, the closing bid price as furnished by (i) the National

                                       -4-








Association of Securities Dealers, Inc. through NASDAQ or (ii) a
similar organization if NASDAQ is no longer reporting such
information.

                  4.       Issuance of Certificates.

                  Upon the exercise of the Warrants, the issuance of
certificates for the Shares purchased shall be made forthwith (and in any event
within three (3) business days thereafter) without charge to the Holder thereof
including, without limitation, any tax which may be payable in respect of the
issuance thereof, and such certificates shall (subject to the provisions of
Article 5 hereof) be issued in the name of, or in such names as may be directed
by, the Holder thereof; provided, however, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the issuance and delivery of any such certificates in a name other than that
of the Holder and the Company shall not be required to issue or deliver such
certificates unless or until the person or persons requesting the issuance
thereof shall have paid to the Company the amount of such tax or shall have
established to the satisfaction of the Company that such tax has been paid.

                  The Warrant Certificates and the certificates representing the
Shares shall be executed on behalf of the Company by the manual or facsimile
signature of the present or any future Chairman or Vice Chairman of the Board of
Directors, Chief Executive Officer or President or Vice President of the Company
under its corporate seal reproduced thereon, attested to by the manual or
facsimile signature of the present or any future

                                       -5-








Secretary or Assistant Secretary of the Company. Warrant Certificates shall be
dated the date of execution by the Company upon initial issuance, division,
exchange, substitution or transfer.

                  Upon exercise, in part or in whole, of the Warrants
Certificates representing the Shares shall bear a legend substantially similar
to the following:

         "The securities represented by this certificate and the other
         securities issuable upon exercise thereof have not been registered for
         purposes of public distribution under the Securities Act of 1933, as
         amended (the "Act"), and may not be offered or sold except (i) pursuant
         to an effective registration statement under the Act, (ii) to the
         extent applicable, pursuant to Rule 144 under the Act (or any similar
         rule under such Act relating to the disposition of securities), or
         (iii) upon the delivery by the holder to the Company of an opinion of
         counsel, reasonably satisfactory to counsel to the Company, stating
         that an exemption from registration under such Act is available."

                  5.       Restriction on Transfer of Warrants. 

                  The Holder of a Warrant Certificate, by the Holder's
acceptance thereof, covenants and agrees that the Warrants are being acquired as
an investment and not with a view to the distribution thereof, and that the
Warrants may not be sold, transferred, assigned, hypothecated or otherwise
disposed of, in whole or in part, for a period of one (1) year from the date
hereof [Effective Date], except to the Designees.

                  6.       Price.

                           6.1.     Initial and Adjusted Exercise Price.  The
initial exercise price of each Warrant shall be $_______ per Share. The adjusted
exercise price per Share shall be the price which shall result from time to time
from any and all adjustments

                                       -6-








of the initial exercise price per Share in accordance with the provisions of
Article 8 hereof.

                           6.2.     Exercise Price.  The term "Exercise Price"
herein shall mean the initial exercise price or the adjusted exercise price,
depending upon the context.

                  7.       Registration Rights.

                           7.1.     Registration Under the Securities Act of
1933. None of the Warrants or Shares have been registered for purposes of public
distribution under the Securities Act of 1933, as amended (the "Act").

                           7.2.     Registrable Securities.  As used herein the
term "Registrable Security" means each of the Warrants, the Shares and any
shares of Common Stock issued upon any stock split or stock dividend in respect
of such Shares; provided, however, that with respect to any particular
Registrable Security, such security shall cease to be a Registrable Security
when, as of the date of determination, (i) it has been effectively registered
under the Act and disposed of pursuant thereto, (ii) registration under the Act
is no longer required for the subsequent public distribution of such security or
(iii) it has ceased to be outstanding. The term "Registrable Securities" means
any and/or all of the securities falling within the foregoing definition of a
"Registrable Security." In the event of any merger, reorganization,
consolidation, recapitalization or other change in corporate structure affecting
the Common Stock, such adjustment shall be made in the definition of
"Registrable

                                       -7-








Security" as is appropriate in order to prevent any dilution or enlargement of
the rights granted pursuant to this Article 7.

                           7.3.     Piggyback Registration.  If, at any time
during the seven years following the effective date of the Public Offering, the
Company proposes to prepare and file one or more post-effective amendments to
the registration statement filed in connection with the Public Offering or any
new registration statement or post-effective amendments thereto covering equity
or debt securities of the Company, or any such securities of the Company held by
its shareholders (in any such case, other than in connection with a merger,
acquisition or pursuant to Form S-8 or successor form), (for purposes of this
Article 7, collectively, the "Registration Statement"), it will give written
notice of its intention to do so by registered mail ("Notice"), at least thirty
(30) business days prior to the filing of each such Registration Statement, to
all holders of the Registrable Securities. Upon the written request of such a
holder (a "Requesting Holder"), made within twenty (20) business days after
receipt of the Notice, that the Company include any of the Requesting Holder's
Registrable Securities in the proposed Registration Statement, the Company
shall, as to each such Requesting Holder, use its best efforts to effect the
registration under the Act of the Registrable Securities which it has been so
requested to register ("Piggyback Registration"), at the Company's sole cost and
expense and at no cost or expense to the Requesting Holders (except as provided
in Section 7.5(d) hereof. Notwithstanding the provisions of this Section 7.3,
the Company shall have the

                                       -8-








right at any time after it shall have given written notice pursuant to this
Section 7.3 (irrespective of whether any written request for inclusion of
Registrable Securities shall have already been made) to elect not to file any
such proposed Registration Statement, or to withdraw the same after the filing
but prior to the effective date thereof.

                           7.4.     Demand Registration.

                                    (a) At any time during the Warrant Exercise
Term, any "Majority Holder" (as such term is defined in Section 7.4(d) below) of
the Registrable Securities shall have the right (which right is in addition to
the piggyback registration rights provided for under Section 7.3 hereof),
exercisable by written notice to the Company (the "Demand Registration
Request"), to have the Company prepare and file with the Securities and Exchange
Commission (the "Commission"), on one occasion, at the sole expense of the
Company (except as provided in Section 7.5(b) hereof), a Registration Statement
and such other documents, including a prospectus, as may be necessary (in the
opinion of both counsel for the Company and counsel for such Majority Holder),
in order to comply with the provisions of the Act, so as to permit a public
offering and sale of the Registrable Securities by the holders thereof. The
Company shall use its best efforts to cause the Registration Statement to become
effective under the Act, so as to permit a public offering and sale of the
Registrable Securities by the holders thereof. Once effective, the Company will
use its best efforts to maintain the effectiveness of the Registration Statement
until the earlier of

                                       -9-








(i) the date that all of the Registrable Securities may be freely traded without
registration under the Act, under Rule 144(k) promulgated under the Act or
otherwise.

                                    (b) The Company covenants and agrees to give
written notice of any Demand Registration Request to all holders of the
Registrable Securities within ten (10) business days from the date of the
Company's receipt of any such Demand Registration Request. After receiving
notice from the Company as provided in this Section 7.4(b), holders of
Registrable Securities may request the Company to include their Registrable
Securities in the Registration Statement to be filed pursuant to Section 7.4(a)
hereof by notifying the Company of their decision to have such securities
included within ten (10) days of their receipt of the Company's notice.

                                    (c) In addition to the registration rights
provided for under Section 7.3 hereof and subsection (a) of this Section 7.4, at
any time during the Warrant Exercise Term, any Majority Holder (as defined below
in Section 7.4(d)) of Registrable Securities shall have the right, exercisable
by written request to the Company, to have the Company prepare and file with the
Commission, on one occasion in respect of all holders of Registrable Securities,
a Registration Statement so as to permit a public offering and sale of such
Registrable Securities for nine (9) consecutive months, provided, however, that
all costs incident thereto shall be at the expense of the holders of the
Registrable Securities included in such Registration Statement. If a Majority
Holder shall give notice

                                      -10-








to the Company at any time of its or their desire to exercise the registration
right granted pursuant to this Section 7.4(c), then within ten (10) days after
the Company's receipt of such notice, the Company shall give notice to the other
holders of Registrable Securities, advising them that the Company is proceeding
with such registration and offering to include therein the Registrable
Securities of such holders, provided they furnish the Company with such
appropriate information in connection therewith as the Company shall reasonably
request in writing.

                                    (d) The term "Majority Holder" as used in
Section 7.4 hereof shall mean any holder or any combination of holders of
Registrable Securities, if included in such holders' Registrable Securities are
that aggregate number of shares of Common Stock (including Shares already issued
and Shares issuable pursuant to the exercise of outstanding Warrants) as would
constitute a majority of the aggregate number of Shares (including Shares
already issued and Shares issuable pursuant to the exercise of outstanding
Warrants) included in all the Registrable Securities.

                           7.5.     Covenants of the Company With Respect to
Registration.  The Company covenants and agrees as follows:

                                    (a)     In connection with any registration
under Section 7.4 hereof, the Company shall file the Registration Statement as
expeditiously as possible, but in any event no later than twenty (20) days
following receipt of any demand therefor, shall use its best efforts to have any
such Registration Statement declared effective at the earliest possible time,
and

                                      -11-








shall furnish each holder of Registrable Securities such number of prospectuses
as shall reasonably be requested.

                                    (b) The Company shall pay all costs, fees
and expenses (other than underwriting fees, discounts and nonaccountable expense
allowance applicable to the Registrable Securities and the fees and expenses of
counsel retained by the holders of Registrable Securities) in connection with
all Registration Statements filed pursuant to Sections 7.3 and 7.4(a) hereof
including, without limitation, the Company's legal and accounting fees, printing
expenses, and blue sky fees and expenses.

                                    (c) The Company will take all necessary
action which may be required in qualifying or registering the Registrable
Securities included in the Registration Statement for offering and sale under
the securities or blue sky laws of such states as are reasonably requested by
the holders of such securities.

                                    (d) The Company shall indemnify any holder
of the Registrable Securities to be sold pursuant to any Registration Statement
and any underwriter or person deemed to be an underwriter under the Act and each
person, if any, who controls such holder or underwriter or person deemed to be
an underwriter within the meaning of Section 15 of the Act or Section 20(a) of
the Securities Exchange Act of 1934, as amended ("Exchange Act"), against all
loss, claim, damage, expense or liability (including all expenses reasonably
incurred in investigating, preparing or defending against any claim whatsoever)
to which any of them may

                                      -12-








become subject under the Act, the Exchange Act or otherwise, arising from such
registration statement to the same extent and with the same effect as the
provisions pursuant to which the Company has agreed to indemnify the Underwriter
as set forth in Section 7 of the Underwriting Agreement and to provide for just
and equitable contribution as set forth in Section 8 of the Underwriting
Agreement.

                                    (e) Any holder of Registrable Securities to
be sold pursuant to a registration statement, and such Holder's successors and
assigns, shall severally, and not jointly, indemnify, the Company, its officers
and directors and each person, if any, who controls the Company within the
meaning of Section 15 of the Act or Section 20(a) of the Exchange Act, against
all loss, claim, damage or expense or liability (including all expenses
reasonably incurred in investigating, preparing or defending against any claim
whatsoever) to which they may become subject under the Act, the Exchange Act or
otherwise, arising from information furnished by or on behalf of such holder, or
such Holder's successors or assigns, for specific inclusion in such Registration
Statement to the same extent and with the same effect as the provisions pursuant
to which the Underwriter has agreed to indemnify the Company as set forth in
Section 7 of the Underwriting Agreement and to provide for just and equitable
contribution as set forth in Section 8 of the Underwriting Agreement.

                                    (f) Nothing contained in this Agreement
shall be construed as requiring any Holder to exercise the

                                      -13-








Warrants held by such Holder prior to the initial filing of any registration
statement or the effectiveness thereof.

                                    (g) If the Company shall fail to comply with
the provisions of this Article 7, the Company shall, in addition to any other
equitable or other relief available to the holders of Registrable Securities, be
liable for any or all incidental, special and consequential damages sustained by
the holders of Registrable Securities, requesting registration of their
Registrable Securities.

                                    (h) The Company shall not permit the
inclusion of any securities other than the Registrable Securities to be included
in any Registration Statement filed pursuant to Section 7.4 hereof, without the
prior written consent of the Majority Holders, which consent shall not be
unreasonably withheld.

                                    (i) The Company shall promptly deliver
copies of all correspondence between the Commission and the Company, its counsel
or auditors and all memoranda relating to discussions with the Commission or its
staff with respect to the Registration Statement to each holder of Registrable
Securities included for such registration in such Registration Statement
pursuant to Section 7.3 hereof or Section 7.4 hereof requesting such
correspondence and memoranda and to the managing underwriter, if any, of the
offering in connection with which such Holder's Registrable Securities are being
registered and shall permit each holder of Registrable Securities and such
underwriter to do such reasonable investigation, upon reasonable

                                      -14-








advance notice, with respect to information contained in or omitted from the
Registration Statement as it deems reasonably necessary to comply with
applicable securities laws or rules of the National Association of Securities
Dealers, Inc. Such investigation shall include access to books, records and
properties and opportunities to discuss the business of the Company with its
officers and independent auditors, all to such reasonable extent and at such
reasonable times and as often as any such holder of Registrable Securities or
underwriter shall reasonably request.

                   8. Adjustments of Exercise Price and Number of Shares.

                           8.1.  Computation of Adjusted Price.  In case the
Company shall at any time after the date hereof pay a dividend in shares of
Common Stock or make a distribution in shares of Common Stock, then upon such
dividend or distribution the Exercise Price in effect immediately prior to such
dividend or distribution shall forthwith be reduced to a price determined by
dividing:

                                            (a) an amount equal to the total
number of shares of Common Stock outstanding immediately prior to such dividend
or distribution multiplied by the Exercise Price in effect immediately prior to
such dividend or distribution, by

                                            (b) the total number of shares of
Common Stock outstanding immediately after such issuance or sale.

                                    For the purposes of any computation to be
made in accordance with the provisions of this Section 8.1, the Common Stock
issuable by way of dividend or other distribution on

                                      -15-








any stock of the Company shall be deemed to have been issued immediately after
the opening of business on the date following the date fixed for the
determination of stockholders entitled to receive such dividend or other
distribution.

                           8.2.     Subdivision and Combination.  In case the
Company shall at any time subdivide or combine the outstanding shares of Common
Stock, the Exercise Price shall forthwith be proportionately decreased in the
case of subdivision or increased in the case of combination.

                           8.3.     Adjustment in Number of Shares.  Upon each
adjustment of the Exercise Price pursuant to the provisions of this Article 8,
the number of Shares issuable upon the exercise of each Warrant shall be
adjusted to the nearest full number by multiplying a number equal to the
Exercise Price in effect immediately prior to such adjustment by the number of
Shares issuable upon exercise of the Warrants immediately prior to such
adjustment and dividing the product so obtained by the adjusted Exercise Price.

                           8.4. Reclassification, Consolidation, Merger, etc. In
case of any reclassification or change of the outstanding shares of Common Stock
(other than a change in par value to no par value, or from no par value to par
value, or as a result of a subdivision or combination), or in the case of any
consolidation of the Company with, or merger of the Company into, another
corporation (other than a consolidation or merger in which the Company is the
surviving corporation and which does not result in any reclassification or
change of the outstanding shares of

                                      -16-








Common Stock, except a change as a result of a subdivision or combination of
such shares or a change in par value, as aforesaid), or in the case of a sale or
conveyance to another corporation of the property of the Company as an entirety,
the Holders shall thereafter have the right to purchase the kind and number of
shares of stock and other securities and property receivable upon such
reclassification, change, consolidation, merger, sale or conveyance as if the
Holders were the owners of the shares of Common Stock underlying the Warrants
immediately prior to any such events at a price equal to the product of (x) the
number of shares of Common Stock issuable upon exercise of the Holder's Warrants
and (y) the Exercise Price in effect immediately prior to the record date for
such reclassification, change, consolidation, merger, sale or conveyance as if
such Holders had exercised the Warrants.

                           8.5. Determination of Outstanding Shares of Common
Stock. The number of shares of Common Stock at any one time outstanding shall
include the aggregate number of shares of Common Stock issued and the aggregate
number of shares of Common Stock issuable upon the exercise of options, rights,
warrants and upon the conversion or exchange of convertible or exchangeable
securities.

                           8.6. Dividends and Other Distributions with Respect
to Outstanding Securities. In the event that the Company shall at any time prior
to the exercise of all Warrants make any distribution of its assets to holders
of its Common Stock as a liquidating or a partial liquidating dividend, then the
holder of

                                      -17-








Warrants who exercises its Warrants after the record date for the determination
of those holders of Common Stock entitled to such distribution of assets as a
liquidating or partial liquidating dividend shall be entitled to receive for the
Warrant Price per Warrant, in addition to each share of Common Stock, the amount
of such distribution (or, at the option of the Company, a sum equal to the value
of any such assets at the time of such distribution as determined by the Board
of Directors of the Company in good faith) which would have been payable to such
holder had he been the holder of record of the Common Stock receivable upon
exercise of his Warrant on the record date for the determination of those
entitled to such distribution. At the time of any such dividend or distribution,
the Company shall make appropriate reserves to ensure the timely performance of
the provisions of this Subsection 8.6.

                           8.7.     Subscription Rights for Shares of Common
Stock or Other Securities. In the case that the Company or an affiliate of the
Company shall at any time after the date hereof and prior to the exercise of all
the Warrants issue any rights, warrants or options to subscribe for shares of
Common Stock or any other securities of the Company or of such affiliate to all
the shareholders of the Company, the Holders of unexercised Warrants on the
record date set by the Company or such affiliate in connection with such
issuance of rights, warrants or options shall be entitled, in addition to the
shares of Common Stock or other securities receivable upon the exercise of the
Warrants, to receive such rights, warrants or options shall be entitled, in

                                      -18-








addition to the shares of Common Stock or other securities receivable upon the
exercise of the Warrants, to receive such rights at the time such rights,
warrants or options that such Holders would have been entitled to receive had
they been, on such record date, the holders of record of the number of whole
shares of Common Stock then issuable upon exercise of their outstanding Warrants
(assuming for purposes of this Section 8.7), that the exercise of the Warrants
is permissible immediately upon issuance).

                  9.       Exchange and Replacement of Warrant Certificates.

                  Each Warrant Certificate is exchangeable without expense, upon
the surrender thereof by the registered Holder at the principal executive office
of the Company, for a new Warrant Certificate of like tenor and date
representing in the aggregate the right to purchase the same number of
securities in such denominations as shall be designated by the Holder thereof at
the time of such surrender.

                  Upon receipt by the Company of evidence reasonably
satisfactory to it of the loss, theft, destruction or mutilation of any Warrant
Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to it, and reimbursement to the Company of all
reasonable expenses incidental thereto, and upon surrender and cancellation of
the Warrant Certificate, if mutilated, the Company will make and deliver a new
Warrant Certificate of like tenor, in lieu thereof.

                  10.      Elimination of Fractional Interests.

                                                      -19-








                  The Company shall not be required to issue certificates
representing fractions of Shares, nor shall it be required to issue scrip or pay
cash in lieu of fractional interests, it being the intent of the parties that
all fractional interests shall be eliminated by rounding any fraction up to the
nearest whole number of Shares.

                  11.      Reservation and Listing of Securities.

                  The Company shall at all times reserve and keep avail-
able out of its authorized shares of Common Stock, solely for the purpose of
issuance upon the exercise of the Warrants, such number of shares of Common
Stock as shall be issuable upon the exercise thereof. The Company covenants and
agrees that, upon exercise of the Warrants and payment of the Exercise Price
therefor, all Shares issuable upon such exercise shall be duly and validly
issued, fully paid, non-assessable and not subject to the preemptive rights of
any shareholder. As long as the Warrants shall be outstanding, the Company shall
use its best efforts to cause all shares of Common Stock issuable upon the
exercise of the Warrants to be listed on or quoted by NASDAQ or listed on such
national securities exchange, in the event the Common Stock is listed on a
national securities exchange.

                  12.      Notices to Warrant Holders.

                  Nothing contained in this Agreement shall be construed
as conferring upon the Holder or Holders the right to vote or to consent or to
receive notice as a shareholder in respect of any meetings of shareholders for
the election of directors or any other matter, or as having any rights
whatsoever as a shareholder

                                      -20-








of the Company. If, however, at any time prior to the expiration of the Warrants
and their exercise, any of the following events shall occur:

                                    (a) the Company shall take a record of the
                  holders of its shares of Common Stock for the purpose of
                  entitling them to receive a dividend or distribution payable
                  otherwise than in cash, or a cash dividend or distribution
                  payable otherwise than out of current or retained earnings, as
                  indicated by the accounting treatment of such dividend or
                  distribution on the books of the Company; or

                                    (b) the Company shall offer to all the
                  holders of its Common Stock any additional shares of capital
                  stock of the Company or securities convertible into or
                  exchangeable for shares of capital stock of the Company, or
                  any option, right or warrant to subscribe therefor; or

                                    (c) a dissolution, liquidation or winding up
                  of the Company (other than in connection with a consolidation
                  or merger) or a sale of all or substantially all of its
                  property, assets and business as an entirety shall be
                  proposed; or

                                    (d) reclassification or change of the
                  outstanding shares of Common Stock (other than a change in par
                  value to no par value, or from no par value to par value, or
                  as a result of a subdivision or combination), consolidation of
                  the Company with, or merger of the

                                      -21-








                  Company into, another corporation (other than a consolidation
                  or merger in which the Company is the surviving corporation
                  and which does not result in any reclassification or change of
                  the outstanding shares of Common Stock, except a change as a
                  result of a subdivision or combination of such shares or a
                  change in par value, as aforesaid), or a sale or conveyance to
                  another corporation of the property of the Company as an
                  entirety is proposed; or

                                    (e) The Company or an affiliate of the
                  Company shall propose to issue any rights to subscribe for
                  shares of Common Stock or any other securities of the Company
                  or of such affiliate to all the shareholders of the Company;

then, in any one or more of said events, the Company shall give written notice
to the Holder or Holders of such event at least fifteen (15) days prior to the
date fixed as a record date or the date of closing the transfer books for the
determination of the shareholders entitled to such dividend, distribution,
convertible or exchangeable securities or subscription rights, options or
warrants, or entitled to vote on such proposed dissolution, liquidation, winding
up or sale. Such notice shall specify such record date or the date of closing
the transfer books, as the case may be. Failure to give such notice or any
defect therein shall not affect the validity of any action taken in connection
with the declaration or payment of any such dividend or distribution, or the
issuance of any convertible or exchangeable

                                      -22-








securities or subscription rights, options or warrants, or any proposed
dissolution, liquidation, winding up or sale.

                  13.      Notices.

                  All notices, requests, consents and other communications
hereunder shall be in writing and shall be deemed to have been duly made when
delivered, or mailed by registered or certified mail, return receipt requested:

                                    (a) If to a registered Holder of the
                  Warrants, to the address of such Holder as shown on the books
                  of the Company; or

                                    (b) If to the Company, to the address set
                  forth in Section 3 of this Agreement or to such other address
                  as the Company may designate by notice to the Holders.


                  14.      Supplements and Amendments.

                  The Company and the Underwriter may from time to time
supplement or amend this Agreement without the approval of any Holders of
Warrant Certificates in order to cure any ambiguity, to correct or supplement
any provision contained herein which may be defective or inconsistent with any
provisions herein, or to make any other provisions in regard to matters or
questions arising hereunder which the Company and the Underwriter may deem
necessary or desirable and which the Company and the Underwriter deem not to
adversely affect the interests of the Holders of Warrant Certificates.

                                      -23-








                  15.      Successors.

                  All the covenants and provisions of this Agreement by or for
the benefit of the Company and the Holders inure to the benefit of their
respective successors and assigns hereunder.

                  16.      Termination.

                  This Agreement shall terminate at the close of business on
__________, 2004. Notwithstanding the foregoing, this Agreement will terminate
on any earlier date when all Warrants have been exercised and all the Shares
issuable upon exercise of the Warrants have been resold to the public; provided,
however, that the provisions of Section 7 shall survive any termination pursuant
to this Section 16 until the close of business on _________, 2007.

                  17.      Governing Law.

                  This Agreement and each Warrant Certificate issued hereunder
shall be deemed to be a contract made under the laws of the State of New York
and for all purposes shall be construed in accordance with the laws of said
State.

                  18.      Benefits of This Agreement.

                  Nothing in this Agreement shall be construed to give to
any person or corporation other than the Company and the Underwriter and any
other registered holder or holders of the Warrant Certificates, Warrants or the
Shares any legal or equitable right, remedy or claim under this Agreement; and
this Agreement shall be for the sole and exclusive benefit of the Company and
the Underwriter and any other holder or holders of the Warrant Certificates,
Warrants or the Shares.

                                      -24-








                  19.      Counterparts.

                  This Agreement may be executed in any number of counterparts
and each of such counterparts shall for all purposes be deemed to be an
original, and such counterparts shall together constitute but one and the same
instrument.

                  IN WITNESS WHEREOF, the parties hereto have caused this
Agreement to be duly executed, as of the day and year first above written.

[SEAL]                               HEALTHDESK CORPORATION

                                     By:
                                        -----------------------------------
                                        Name:
                                        Title:

Attest:

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

                                      WHALE SECURITIES CO., L.P.

                                      By:  Whale Securities Corp.,
                                               General Partner




                                     By:
                                        -----------------------------------
                                        Name:
                                        Title:


                                      -25-








                                    EXHIBIT A

THE WARRANTS REPRESENTED BY THIS CERTIFICATE AND THE OTHER SECURITIES ISSUABLE
UPON EXERCISE THEREOF HAVE NOT BEEN REGISTERED FOR PURPOSES OF PUBLIC
DISTRIBUTION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), AND MAY
NOT BE OFFERED OR SOLD EXCEPT (i) PURSUANT TO AN EFFECTIVE REGISTRATION
STATEMENT UNDER THE ACT, (ii) TO THE EXTENT APPLICABLE, PURSUANT TO RULE 144
UNDER SUCH ACT (OR ANY SIMILAR RULE UNDER SUCH ACT RELATING TO THE DISPOSITION
OF SECURITIES), OR (iii) UPON THE DELIVERY BY THE HOLDER TO THE COMPANY OF AN
OPINION OF COUNSEL, REASONABLY SATISFACTORY TO COUNSEL FOR THE COMPANY, STATING
THAT AN EXEMPTION FROM REGISTRATION UNDER SUCH ACT IS AVAILABLE.

THE TRANSFER OR EXCHANGE OF THE WARRANTS REPRESENTED BY THIS
CERTIFICATE IS RESTRICTED IN ACCORDANCE WITH THE WARRANT AGREE-
MENT REFERRED TO HEREIN.

            EXERCISABLE AT ANY TIME COMMENCING _________, 1997 UNTIL
                    5:00 P.M., NEW YORK TIME, _________, 2001

No. W-                                                         _______ Warrants

                               WARRANT CERTIFICATE

                  This Warrant Certificate certifies that _______________
____________ or registered assigns, is the registered holder of _______ Warrants
to purchase, at any time from _______, 1997 until 5:00 P.M. New York City time
on ________, 2001 ("Expiration Date"), up to _____ fully-paid and non-assessable
shares ("Shares") of common stock, no par value (the "Common Stock"), of
________________, a __________ corporation (the "Company"), at the initial
exercise price, subject to adjustment in certain events (the "Exercise Price"),
of $____ per Share upon surrender of this Warrant Certificate and payment of the
Exercise Price at an office or agency of the Company, but subject to the
conditions set forth herein and in the warrant agreement dated as of
____________, 1996 between the Company and Whale Securities Co., L.P. (the
"Warrant Agreement"). Payment of the Exercise Price may be made in cash, or by
certified or official bank check in New York Clearing House funds payable to the
order of the Company, or any combination thereof.

                  No Warrant may be exercised after 5:00 P.M., New York City
time, on the Expiration Date, at which time all Warrants evidenced hereby,
unless exercised prior thereto, shall thereafter be void.

                  The Warrants evidenced by this Warrant Certificate are part of
a duly authorized issue of Warrants issued pursuant to the Warrant Agreement,
which Warrant Agreement is hereby incorporated by reference in and made a part
of this instrument and is hereby referred to in a description of the rights,
limitation of








rights, obligations, duties and immunities thereunder of the Company and the
holders (the words "holders" or "holder" meaning the registered holders or
registered holder) of the Warrants.

                  The Warrant Agreement provides that upon the occurrence of
certain events, the Exercise Price and the type and/or number of the Company's
securities issuable thereupon may, subject to certain conditions, be adjusted.
In such event, the Company will, at the request of the holder, issue a new
Warrant Certificate evidencing the adjustment in the Exercise Price and the
number and/or type of securities issuable upon the exercise of the Warrants;
provided, however, that the failure of the Company to issue such new Warrant
Certificates shall not in any way change, alter, or otherwise impair, the rights
of the holder as set forth in the Warrant Agreement.

                  Upon due presentment for registration of transfer of this
Warrant Certificate at an office or agency of the Company, a new Warrant
Certificate or Warrant Certificates of like tenor and evidencing in the
aggregate a like number of Warrants shall be issued to the transferee(s) in
exchange for this Warrant Certificate, subject to the limitations provided
herein and in the Warrant Agreement, without any charge except for any tax, or
other governmental charge imposed in connection therewith.

                  Upon the exercise of less than all of the Warrants evidenced
by this Certificate, the Company shall forthwith issue to the holder hereof a
new Warrant Certificate representing such number of unexercised Warrants.

                  The Company may deem and treat the registered holder(s) hereof
as the absolute owner(s) of this Warrant Certificate (notwithstanding any
notation of ownership or other writing hereon made by anyone), for the purpose
of any exercise hereof, and of any distribution to the holder(s) hereof, and for
all other purposes, and the Company shall not be affected by any notice to the
contrary.

                  All terms used in this Warrant Certificate which are defined
in the Warrant Agreement shall have the meanings assigned to them in the Warrant
Agreement.

                  IN WITNESS WHEREOF, the Company has caused this Warrant
Certificate to be duly executed under its corporate seal.

Dated:  ___________, 1996            HEALTHDESK CORPORATION




[SEAL]                               By:
                                        -----------------------------------
                                        Name:
                                        Title:



Attest:

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










                         [FORM OF ELECTION TO PURCHASE]

                  The undersigned hereby irrevocably elects to exercise the
right, represented by this Warrant Certificate, to purchase _________ shares of
Common Stock and herewith tenders in payment for such securities cash or a
certified or official bank check payable in New York Clearing House Funds to the
order of HealthDesk Corporation in the amount of $ , all in accordance with the
terms hereof. The undersigned requests that a certificate for such securities be
registered in the name of______________________________________________________
_______________________________________________________________________________
__________________________, whose address is __________________, and that such
Certificate be delivered to __________________, whose address is _____________.

Dated:                                   Signature:
                                                    ---------------------------
                                         (Signature must conform in all respects
                                         to name of holder as specified on the
                                         face of the Warrant Certificate.)

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

                                         --------------------------------
                                         (Insert Social Security or Other
                                          Identifying Number of Holder)








                              [FORM OF ASSIGNMENT]

             (To be executed by the registered holder if such holder
                  desires to transfer the Warrant Certificate.)

                  FOR VALUE RECEIVED
                                     -----------------------------------------
hereby sells, assigns and transfers unto


- ------------------------------------------------------------------------------
(Please print name and address of transferee)

this Warrant Certificate, together with all right, title and interest therein,
and does hereby irrevocably constitute and appoint _______________, Attorney, to
transfer the within Warrant Certificate on the books of the within-named
Company, with full power of substitution.

Dated:                                     Signature:
                                                     --------------------------
                                           (Signature must conform in all
                                           respects to name of holder as
                                           specified on the face of the
                                           Warrant Certificate)

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

- -------------------------------
(Insert Social Security or Other
Identifying Number of Assignee)