Document:

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                                                                   EXHIBIT 10.59

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. NO SALE
OR DISPOSITION MAY BE EFFECTED WITHOUT THE PRIOR WRITTEN CONSENT OF THE COMPANY
OR WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO OR AN OPINION OF
COUNSEL FOR THE HOLDER, REASONABLY SATISFACTORY TO THE COMPANY, THAT SUCH
REGISTRATION IS NOT REQUIRED UNDER THE ACT.

THIS WARRANT MAY NOT BE EXERCISED EXCEPT IN COMPLIANCE WITH ALL APPLICABLE
FEDERAL AND STATE SECURITIES LAWS TO THE REASONABLE SATISFACTION OF THE COMPANY
AND LEGAL COUNSEL FOR THE COMPANY.

                              WARRANT TO PURCHASE
                        820,000 SHARES OF COMMON STOCK
                                      OF
                               drkoop.com, Inc.
                            A DELAWARE CORPORATION

                                    ISSUED
                                APRIL 24, 2000

     THIS CERTIFIES THAT, for value received, Infoseek Corporation (the
"WARRANTHOLDER") is entitled to purchase, on the terms hereof, eight hundred
twenty thousand (820,000) shares of common stock (subject to adjustment), par
value $.001 per share (the "COMMON STOCK"), of drkoop.com, Inc., a Delaware
corporation (the "COMPANY"), at a purchase price and upon the terms and
conditions as set forth herein.

1    EXERCISE OF WARRANT.

     The terms and conditions upon which this Warrant may be exercised and the
shares of Common Stock covered hereby (the "WARRANT STOCK") may be purchased are
as follows:

     1.1   Exercise. This warrant may be exercised in whole or in part at any
time or from time to time on or after July 15, 2000 and prior to 5:00 p.m., San
Francisco, California time on April 9, 2003 (the "Termination Date"); provided,
however, that in the event Warrantholder fails to provide, after written notice
and an opportunity to cure, the performance of services required by the
Amendment dated as of April 24, 2000 by the Company, the Warrantholder and the
other parties identified as parties therein, this Warrant shall become null and
void.

     1.2   Exercise Price. The purchase price for the shares of Common Stock to
be issued upon exercise of this Warrant shall be $1.25 per share, subject to
adjustment as set forth herein (the "EXERCISE PRICE").

     1.3 Method of Exercise. The exercise of the purchase rights evidenced by
this Warrant shall be effected by (a) the surrender of this Warrant, together
with a duly executed copy of the form of Election to Purchase attached hereto,
to the Company at its principal office and
<PAGE>

(b) the delivery of the Exercise Price multiplied by the number of shares for
which the purchase rights hereunder are being exercised, payable (x) by
certified check, corporate check of Infoseek Corporation, or wire transfer of
immediately available funds payable to the Company's order or (y) on a net
basis, such that, without the exchange of any funds, the Warrantholder receives
that number of shares otherwise issuable (or other consideration payable) upon
exercise of this Warrant less that number of shares of Warrant Stock having an
aggregate fair market value (as defined below) at the time of exercise (i.e.,
the date a duly executed Election to Purchase is delivered to the Company) equal
to the aggregate Exercise Price that would otherwise have been paid by the
Warrantholder for the shares of the Warrant Stock issuable. In connection with
such exercise the holder shall, if requested by the Company, include
confirmation of the accuracy of the representations set forth in Section 12 and
otherwise as reasonably requested by the Company to evidence compliance with any
applicable securities laws as of the date of exercise. For purposes of the
foregoing, "FAIR MARKET VALUE" of the Warrant Stock on any date shall be the
average of the Quoted Prices of the Common Stock of the Company for 20
consecutive trading days ending the trading day prior to such date (if, during
such 20-day period, there is a day in which no trades are reported, such date
shall be discarded and the 20-day period extended). The "QUOTED PRICE" of the
Common Stock as reported by Nasdaq or, if the principal trading market for the
Common Stock is then a securities exchange, the last reported sales price of the
Common Stock on such exchange which shall be consolidated trading if applicable
to such exchange, or if neither so reported or listed, the last reported bid
price of the Common Stock. In the absence of quotation or listing, such
determination as to "Quoted Price" shall be made in good faith by the Board of
Directors of the Company.

     1.4  Issuance of Shares. In the event that the purchase rights evidenced by
this Warrant are exercised in whole or in part in accordance with the terms of
this Warrant, a certificate or certificates for the purchased shares shall be
issued to the Warrantholder as soon as practicable. The Warrant Stock shall be
stamped or imprinted with a legend in substantially the following form:

     "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. NO
     SALE OR OTHER DISPOSITION MAY BE EFFECTED WITHOUT THE PRIOR WRITTEN CONSENT
     OF THE COMPANY AND WITHOUT AN EFFECTIVE REGISTRATION STATEMENT RELATED
     THERETO OR AN OPINION OF COUNSEL FOR THE HOLDER, SATISFACTORY TO THE
     COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT."

     In the event the purchase rights evidenced by this Warrant are exercised in
part, the Company will also issue to the Warrantholder a new warrant
representing the unexercised purchase rights.

     1.5 Exercise of Warrants on Termination Date. If as of the Termination Date
the Warrants are in the money based on the cash or other property to be
received, such exercise shall take place automatically with respect to all then
outstanding and exercisable (but not exercised) Warrants (the "TERMINATION DATE
EXERCISE"), on a net exercise basis, immediately prior to the Termination Date;
provided, however, that the Company may condition such exercise on the

                                       2
<PAGE>

delivery by the Warrantholder of a duly completed Election to Purchase and the
reasonable satisfaction of the Company that all applicable securities laws have
been complied with, which the Company shall give notice to the Warrantholder of
within ten (10) days prior to the Termination Date. No such Termination Date
Exercise shall take place if such issuance would not comply with applicable
securities laws, whereupon the Termination Date shall occur as scheduled.

2    CERTAIN ADJUSTMENTS.

     2.1  Stock Dividends. If at any time while this Warrant remains outstanding
and unexpired, the Company pays a dividend or makes a distribution with respect
to the Common Stock payable in shares of Common Stock, then the Exercise Price
shall be adjusted, as of the record date of stockholders established for such
purpose (or if no such record is taken, as at the date of such payment or
distribution), to that price determined by multiplying the Exercise Price in
effect immediately prior to such payment or distribution by a fraction (A) the
numerator of which shall be the total number of shares of Common Stock
outstanding immediately prior to such dividend or distribution, and (B) the
denominator of which shall be the total number of shares of Common Stock
outstanding immediately after such dividend or distribution. The Warrantholder
shall thereafter be entitled to purchase, at the Exercise Price resulting from
such adjustment, the number of shares of Common Stock (calculated to the nearest
whole share) obtained by multiplying the Exercise Price in effect immediately
prior to such adjustment by the number of shares of Common Stock issuable upon
the exercise hereof immediately prior to such adjustment and dividing the
product thereof by the Exercise Price resulting from such adjustment. The
provisions of this Section 2.1 shall not apply under any of the circumstances
for which an adjustment is provided under Sections 2.2, 2.3 or 2.4.

     2.2  Mergers, Consolidations or Sale of Assets. If at any time while this
Warrant remains outstanding and unexpired, there shall be a capital
reorganization of the shares of the Company's capital stock (other than a
combination, reclassification, exchange or subdivision otherwise provided for
herein), or a merger or consolidation of the Company with or into another
corporation in which the Company is not the surviving corporation (collectively,
a "CORPORATE TRANSACTION"), then lawful provision shall be made so that the
Warrantholder shall thereafter be entitled to receive, upon exercise of this
Warrant, during the period specified in this Warrant and upon payment of the
Exercise Price then in effect, the number of shares of stock or other securities
or property of the successor corporation resulting from such Corporate
Transaction to which a holder of the securities deliverable upon exercise of
this Warrant would have been entitled under the provisions of the agreement in
such Corporate Transaction if this Warrant had been exercised immediately prior
to such Corporate Transaction. Appropriate adjustment (as determined in good
faith by the Company's Board of Directors) shall be made in the application of
the provisions of this Warrant with respect to the rights and interests of the
Warrantholder after the Corporate Transaction to the end that the provisions of
this Warrant (including adjustment of the purchase price then in effect and the
number of shares of securities issuable under this Warrant) shall be applicable
after the Corporate Transaction, as near as reasonably may be, in relation to
any shares or other property deliverable after the Corporate Transaction upon
exercise of this Warrant.

                                       3
<PAGE>

     2.3  Reclassification. If the Company at any time shall, by subdivision,
combination or reclassification or securities or otherwise, change any of the
securities issuable under this Warrant into the same or a different number of
securities of any other class or classes, this Warrant shall thereafter
represent the right to acquire such number and kind of securities as would have
been issuable as a result of such change with respect to the securities issuable
under this Warrant immediately prior to such subdivision, combination,
reclassification or other change.

     2.4  Subdivision or Combination of Shares. If at any time while this
Warrant remains outstanding and unexpired, the number of shares of Common Stock
outstanding is decreased by a combination of the outstanding shares of Common
Stock, then the Exercise Price shall be proportionately increased in the case of
a combination of such shares, or shall be proportionately decreased in the case
of a subdivision of such shares, and the number of shares of Common Stock
issuable upon exercise of the Warrant shall thereafter be adjusted to equal the
product obtained by multiplying the number of shares of Common Stock purchasable
under this Warrant immediately prior to such Exercise Price adjustment by a
fraction (A) the numerator of which shall be the Exercise Price immediately
prior to such adjustment, and (B) the denominator of which shall be the Exercise
Price immediately after such adjustment.

     2.5  Liquidating Dividends, Etc. If the Company at any time while the
Warrant remains outstanding and unexpired makes a distribution of its assets to
the holders of its Common Stock as a dividend in liquidation or by way of return
of capital or other than as a dividend payable out of earnings or surplus
legally available for dividends under applicable law or any distribution to such
holders made in respect of the sale of all or substantially all of the Company's
assets (other than under the circumstances provided for in the foregoing
Sections 2.1 through 2.4), the holder of this Warrant shall be entitled to
receive upon the exercise hereof, in addition to the shares of Common Stock
receivable upon such exercise, and without payment of any consideration other
than the Exercise Price, an amount in cash equal to the value of such
distribution per share of Common Stock multiplied by the number of shares of
Common Stock which, on the record date for such distribution, are issuable upon
exercise of this Warrant (with no further adjustment being made following any
event which causes a subsequent adjustment in the number of shares of Common
Stock issuable upon the exercise hereof), and an appropriate provision therefor
should be made a part of any such distribution. The value of a distribution
which is paid in other than cash shall be determined in good faith by the Board
of Directors.

     2.6  Notice of Adjustments. Whenever any of the Exercise Price or the
number of securities purchasable under the terms of this Warrant at that
Exercise Price shall be adjusted pursuant to Section 2 hereof, the Company shall
promptly notify the Warrantholder in writing of such adjustment, setting forth
in reasonable detail the event requiring the adjustment, the amount of the
adjustment, the method by which such adjustment was calculated, and the Exercise
Price and number of shares of Common Stock or other securities purchasable at
that Exercise Price after giving effect to such adjustment. Such notice shall be
mailed (by first class and postage prepaid) to the registered Warrantholder.

                                       4
<PAGE>

     In the event of:

        (a) The taking by the Company of a record of the holders of any class
of securities of the Company for the purpose of determining the holders thereof
who are entitled to receive any dividend or other distribution, or any right to
subscribe for, purchase or otherwise acquire any shares of stock of any class or
any other securities or property, or to receive any other right for which no
adjustment is required by the operation of this Section 2,

        (b) Any capital reorganization of the Company, any reclassification or
recapitalization of the capital stock of the Company or any transfer of all or
substantially all of the assets of the Company to any other person or any
consolidation or merger involving the Company for which no adjustment is
required by the operation of this Section 2, or

        (c) Any voluntary or involuntary dissolution, liquidation, or winding-up
of the Company,

the Company will mail to the Warrantholder, at its last address at least ten
(10) days prior to the earliest date specified therein as described below, a
notice specifying:

            (i) The date on which any such record is to be taken for the
     purpose of such dividend, distribution or right, and the amount and
     character of such dividend, distribution or right; and

            (ii) The date on which any such reorganization, reclassification,
     transfer, consolidation, merger, dissolution, liquidation or winding-up is
     expected to become effective and the record date for determining
     shareholders entitled to vote thereon.

     Failure to give any notice required under this Section 2.6, or any defect
in such notice, shall not affect the legality or validity of the underlying
corporate action taken or transaction entered into by the Company.

3    FRACTIONAL SHARES.

     No fractional shares shall be issued in connection with any exercise of
this Warrant. In lieu of the issuance of such fractional share, the Company
shall make a cash payment equal to the then fair market value of such fractional
share as determined under Section 1.3.

4    RESERVATION OF COMMON STOCK.

     The Company shall at all times reserve and keep available out of its
authorized but unissued shares of Common Stock, solely for the purpose of
effecting the exercise of this Warrant, a sufficient number of shares of Common
Stock to effect the exercise of the entire Warrant and if at any time the number
of authorized but unissued shares of Common Stock shall not be sufficient to
effect the exercise of the entire Warrant, in addition to such other remedies as
shall be available to the holder of this Warrant, the Company will use its
reasonable efforts to take such corporate action as may, in the opinion of its
counsel, be necessary to increase its

                                       5
<PAGE>

authorized but unissued shares of Common Stock to such number of shares as shall
be sufficient for such purposes.

5    PRIVILEGE OF STOCK OWNERSHIP.

     Prior to the exercise of this Warrant and the issuance to the Warrant
Holder of certificates representing the resulting shares of Common Stock, and
except as otherwise provided herein, the Warrantholder shall not be entitled, by
virtue of holding this Warrant, to any rights of a Stockholder of the Company,
including (without limitation) the right to vote, receive dividends or other
distributions or be notified of Stockholder meetings, and such holder shall not
be entitled to any notice or other communication concerning the business or
affairs of the Company, except as required by law.

6    LIMITATION OF LIABILITY.

     No provision hereof, in the absence of affirmative action by the holder
hereof to purchase the securities issuable under this Warrant, and no mere
enumeration herein of the rights of privileges of the holder hereof, shall give
rise to any liability of such holder for the purchase price or as a Stockholder
of the Company, whether such liability is asserted by the Company or by
creditors of the Company.

7    TRANSFERS AND EXCHANGES.

     This Warrant may not be transferred or assigned in whole or in part.

8    PAYMENT OF TAXES.

     The Company shall pay all stamp or similar issue or transfer taxes payable
in respect of the issue or delivery of the securities issuable under this
Warrant. The Company shall not be required, however, to pay any tax or other
charge imposed in connection with any transfer involved in the issue of any
certificate for shares of the securities issuable under this Warrant in any name
other than that of the Warrantholder, and in such case, the Company shall not be
required to issue or deliver any stock certificate until such tax or other
charge has been paid or it has been established to the Company's satisfaction
that no such tax or other charge is due.

9    NO IMPAIRMENT OF RIGHTS.

     The Company hereby agrees that it will not, through the amendment of its
Certificate of Incorporation or otherwise, avoid or seek to avoid the observance
or performance of any of the terms of this Warrant, but will at all times in
good faith assist in the carrying out of all such terms and in the taking of all
such actions as may be necessary or appropriate in order to protect the rights
of the Warrantholder against impairment.

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<PAGE>

10   SUCCESSORS AND ASSIGNS.

     The terms and provisions of this Warrant shall be binding upon the Company
and the Warrantholder and their respective successors and assigns.

11   LOSS, THEFT, DESTRUCTION OR MUTILATION OF WARRANT.

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

12  SECURITIES LAW MATTERS.

    Warrantholder represents to the Company as follows:

        (a) the Warrants and Common Stock to be acquired by Warrantholder
pursuant hereto will be acquired for its own account and not with a view to, or
intention of, distribution thereof in violation of the Securities Act of 1933
(the "SECURITIES ACT") or any applicable state securities laws, and such
securities will not be disposed of in contravention of the Securities Act or any
applicable state securities laws;

        (b) the Warrantholder understands that (a) the Warrants and Common Stock
issuable on exercise have not been registered under the Securities Act, nor
qualified under the securities laws of any other jurisdiction, (b) such
securities cannot be resold unless they subsequently are registered under the
Securities Act and qualified under applicable state securities laws, unless the
Company determines that exemptions from such registration and qualification
requirements are available, and (c) the Warrantholder has no right to require
such registration or qualification;

        (c) Warrantholder is familiar with the term "accredited investor" as
defined in Rule 501 under the Securities Act and investor is an "accredited
investor" within the meaning of such term in Rule 501 under the Securities Act;

        (d) Warrantholder is sophisticated in financial matters and the market
for Internet companies and is able to evaluate the risks and benefits of the
investment in the Warrants and Common Stock issuable on exercise;

        (e) Warrantholder is able to bear the economic risk of its investment in
the Warrants and the Common Stock issuable on exercise for an indefinite period
of time; and

        (f) Warrantholder has had an opportunity to ask questions and receive
answers concerning the terms and conditions of the offering of securities and
has had full access to such other information concerning the Company as investor
has requested.

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<PAGE>

13   Saturdays, Sundays, holidays.

     If the last or appointed day for the taking of any action or the expiration
of any right required or granted herein shall be a Saturday or Sunday or shall
be a legal holiday, then such action may be taken or such right may be exercised
on the next succeeding day not a legal holiday.

14   GOVERNING LAW.

     This Warrant shall be construed, interpreted, and the rights of the Company
and the Warrantholder determined in accordance with the internal laws of the
State of Delaware, without regard to the conflict of laws provision thereof.

15   BENEFITS OF THIS WARRANT.

     Nothing in this Warrant shall be construed to give any person other than
the Company and the registered Warrantholder any legal or equitable right,
remedy or claim.

16   COUNTERPARTS.

     This Warrant may be exercised in counterpart with each constitution; an
original and together constituting but one and the same Warrant.

                            (signature page follows)

                                       8
<PAGE>

     IT WITNESS WHEREOF, drkoop.com, Inc. has caused this Warrant to be duly
executed and delivered to the Warrantholder identified below on the date first
set forth above.

                                                drkoop.com, Inc.

                                                By: /s/ Donald Hackett
                                                    ------------------
                                                    Donald W. Hackett
                                                    Chief Executive Officer
Dated: April 24, 2000

Acknowledged and Accepted:
--------------------------

Infoseek Corporation

By: /s/ Laura Beauchesne
    --------------------
    Name: Laura Beauchesne
    Title: VP, Deputy General Counsel

Address for Notice:
__________________________
__________________________

                                       9
<PAGE>

                             ELECTION TO PURCHASE
                             --------------------

drkoop.com, Inc.
________________
________________

Ladies and Gentlemen:

     The undersigned hereby elects to purchase, pursuant to the provisions of
the Warrant dated April 24, 2000 held by the undersigned, _________ shares of
the Common Stock of drkoop.com, Inc., a Delaware corporation.

     Payment of the per share purchase price required under such Warrant
[accompanies this Election to Purchase.][shall be made pursuant to the net
exercise provision contained in Section 1.3 of the Warrant.

     The undersigned hereby confirms the representations made in Section 12 of
the Warrant are true and correct as of the date of this Election to Purchase.

Dated: ___________________, 200_

                                              ___________________________
                                              Print Name of Warrantholder

                                              By ________________________

                          Address:               ________________________

                                                 ________________________<PAGE>

                                                                   EXHIBIT 10.60

                             REGISTRATION AGREEMENT

          This REGISTRATION AGREEMENT is made as of April 18, 2000 between
drkoop.com, Inc. (formerly known as Empower Health Corporation), a Delaware
corporation with its principal place of business at 7000 North Mopac Drive,
Suite 400, Austin, Texas 78731 ("drkoop.com") and Adventist Health System
Sunbelt Healthcare Corporation, a Florida Not For Profit Corporation with its
principal place of business at 111 North Orlando Avenue, Winter Park, Florida
32789 ("Adventist") (each individually a "Party" and collectively the "Parties")
(the "Agreement").

                                  WITNESSETH:

          WHEREAS, Adventist and drkoop.com are parties to (i) that certain
Investment Agreement dated as of January 29, 1999, by and among drkoop.com,
Adventist and HealthMagic, Inc. (the "Investment Agreement") and (ii) that
certain Amended and Restated Registration Rights Agreement dated as of January
29, 1999, by and among drkoop.com, Superior Consultant Holdings Corporation,
Neal Longwill and Adventist (the "Registration Rights Agreement") attached
hereto as Exhibit A; and

          WHEREAS, Adventist desires to exercise its ability, under the
Registration Rights Agreement, to demand that drkoop.com register the 2,750,195
unregistered shares of drkoop.com common stock that were transferred to
Adventist under the Investment Agreement (the "Adventist Shares");

          NOW, THEREFORE, for good and valuable consideration and in
consideration of the mutual covenants and conditions herein set forth, and with
the intent to be legally bound thereby, Adventist and drkoop.com hereby agree as
follows:

     1.   Registration of Stock.  Subsequent to June 9, 2000, drkoop.com shall
          use its reasonable best efforts, as provided in the Registration
          Rights Agreement, to effect a registration of the Adventist Shares;
          provided that drkoop.com shall only be required to effect such
          registration if drkoop.com may register the Adventist Shares using a
          Form S-3 registration statement.  Adventist understands that
          drkoop.com may be required to include shares of other stockholders in
          such secondary registration.  Adventist will not exercise any "piggy-
          back" rights in the event that drkoop.com determines to raise capital
          in a primary offering.

     2.   Demand Notice.  Adventist acknowledges and agrees that any
          registration effected after the date hereof shall constitute a
          registration effected pursuant to a Demand Notice (as defined in the
          Registration Rights Agreement) under the Registration Rights
          Agreement.

     3.   Amendments.  No change, amendment or modification of any provision of
          this Agreement or waiver of any of its terms will be valid unless set
          forth in writing and signed by the Party to be bound thereby.
<PAGE>

     4.   Governing Law.  This Agreement shall be interpreted, construed and
          enforced in all respects in accordance with the laws of the State of
          Delaware.

     5.   Waivers.  The failure of either Party to insist upon or enforce strict
          performance by the other Party of any provision of this Agreement or
          to exercise any right under this Agreement shall not be construed as a
          waiver or relinquishment to any extent of such Party's right to assert
          or rely upon any such provision or right in that or any other
          instance; rather the same shall be and remain in full force and
          effect.

     6.   Notices; Payments.  Any notice, payments, approval, request,
          authorization, direction or other communication under this Agreement
          shall be given in writing, shall reference this Agreement, and shall
          be deemed to have been delivered and given: (a) when delivered
          personally; (b) three (3) business days after having been sent by
          registered or certified U.S. mail, return receipt requested, postage
          and charges prepaid; (c) when transmitted if sent by facsimile,
          provided a confirmation of transmission is produced by the sending
          machine and a copy of such facsimile is promptly sent by another means
          specified in this section; or (d) one (1) business day after deposit
          with a commercial overnight courier, with written verification of
          receipt.  All communications and payments will be sent to the
          addresses set forth below or to such other address as may be
          designated by a Party by giving written notice to the other Party
          pursuant to this Section 6.

<TABLE>
          <S>                                                  <C>
          If to Adventist:                                     If to drkoop.com:

          ADVENTIST HEALTH SYSTEM SUNBELT                      DRKOOP.COM, INC.
          HEALTHCARE CORPORATION                               7000 North Mopac, Suite 400
          111 North Orlando Avenue                             Austin, Texas 78731
          Winter Park, Florida 32789                           Attention:  Susan Georgen-Saad
          Attention:                                           Tel: (512) 583-5120
          Tel: (407) 647-4400                                  Fax: (512) 583-5196
          Fax:

          With a copy to:                                      With a copy to:
          Adventist Health System Sunbelt                      Latham & Watkins
          Healthcare Corporation                               233 South Wacker Drive
          111 North Orlando Avenue                             Sears Tower, Suite 5800
          Winter Park, Florida 32789                           Chicago, Illinois 60606
          Attention:  T.L. Trimble, Esq.                       Attention: Mark Mester, Esq.
          Tel: (407) 975-1413                                  Tel:  (312) 876-7700
          Fax: (407) 975-1414                                  Fax:  (312) 993-9767
</TABLE>

     7.   Entire Agreement.  This Agreement and the Registration Rights
          Agreement constitute the entire agreement between the Parties and
          supersede any and all

                                       2
<PAGE>

          prior agreements or understandings between the Parties with respect to
          the 2,750,195 unregistered shares of drkoop.com common stock. Neither
          Party shall be bound by, and each Party specifically objects to, any
          term, condition or other provision or other condition which is
          different from or in addition to the provisions of this Agreement
          (whether or not it would materially alter this Agreement) and which is
          proffered by the other Party in any purchase order, correspondence or
          other document, unless the Party to be bound thereby specifically
          agrees to such provision in writing.

     8.   Headings; Severability.  The headings used in this Agreement are for
          convenience only and are not to be construed to have legal
          significance.  In the event that any provision of this Agreement
          conflicts with the law under which this Agreement is to be construed
          or if any such provision is held invalid by a court with jurisdiction
          over the Parties to this Agreement, such provision shall be deemed to
          be restated to reflect as nearly as possible the original intentions
          of the Parties in accordance with applicable law, and the remainder of
          this Agreement shall remain in full force and effect.

     9.   Counterparts.  This Agreement may be executed in multiple
          counterparts, all of which, taken together, shall constitute one and
          the same instrument.

     10.  Successors and Assigns.  All covenants and agreements in this
          Agreement by or on behalf of either Party hereto will bind and inure
          to the benefit of the respective successors and assigns of the party
          hereto whether so expressed or not.

                            [signature page follows]

                                       3
<PAGE>

          IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to
be executed by duly authorized officers or representatives as of the date first
above written.

ADVENTIST HEALTH SYSTEM                 DRKOOP.COM, INC.
SUNBELT HEALTHCARE
CORPORATION

By: /s/ Thomas L. Werner                By: /s/ Donald Hackett
    --------------------                    --------------------
    Authorized Signature                    Authorized Signature

Print Name: Thomas L. Werner            Print Name: Donald Hackett
            ----------------                        --------------

Title: President                        Title: CEO
       ---------                               ---

                                       4

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