<PAGE>

   As filed with the Securities and Exchange Commission on December 16, 1999
                                                          Registration No. 333-
===============================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.  20549
                                 ____________

                                   FORM S-8
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                                 ____________

                             MEDICONSULT.COM, INC.
            (Exact name of registrant as specified in its charter)


         Delaware                                           84-1341886
(State or other jurisdiction of                    (IRS employer identification
incorporation or organization)                     number)


                          1330 Avenue of the Americas
                           New York, New York 10019
                                (212) 841-7300
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                                  ____________

                            1996 Stock Option Plan
                           (Full title of the plan)
                                  ____________

                               E. Michael Ingram
                           Chief Financial Officer,
                         General Counsel and Secretary
                             Mediconsult.com, Inc.
                          1330 Avenue of the Americas
                           New York, New York 10019
                                (212) 841-7300
                        e-mail: mingram@mediconsult.com
(Name, address and telephone number, including area code, of agent for service)

                                  ____________
                                 With Copy To:
                               Kelly Vance, Esq.
                              Covington & Burling
                          1330 Avenue of the Americas
                           New York, New York 10019
                                (212) 841-1000
                                  ____________
                        CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
                                                        Proposed Maximum    Proposed Maximum    Amount Of
Title Of Each Class Of         Amount To Be                Offering            Aggregate       Registration
Securities To Be Registered     Registered              Price Per Share     Offering Price         Fee

----------------------------------------------------------------------------------------------------------
<S>                           <C>                      <C>                 <C>                <C>
Common Stock, $.001 par
value......................    3,500,000 shares             $8.00 (1)         $28,000,000         $7,392
----------------------------------------------------------------------------------------------------------
</TABLE>
(1) Calculated for the additional shares being registered based upon the average
    of the high and low prices of the Common Stock on the Nasdaq National Market
    on December 13, 1999 in accordance with Rules 457(c) and 457(h) of the
    Securities Act of 1933, as amended.
<PAGE>

                                    PART II

              INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

         The contents of Mediconsult.com, Inc.'s Registration Statement on Form
S-8 relating to its 1996 Stock Option Plan, Registration Nos. 333-32289 and 333-
72971, filed with the Securities and Exchange Commission on July 29, 1997, and
February 26, 1999, respectively, other than the response to Item 8, are hereby
incorporated by reference.  In addition, the information listed in Item 3 is
hereby incorporated by reference herein.

Item 3.  Incorporation of Documents by Reference.

         The following additional document filed by Mediconsult with the
Securities and Exchange Commission under the Securities Act of 1933, as amended,
is hereby incorporated by reference herein:

         .     Prospectus filed November 30, 1999 pursuant to Rule 424(b)

Item 8.  Exhibits.

         The following documents are filed as exhibits to this registration
statement:

EXHIBIT NUMBER             DESCRIPTION
--------------             -----------
4.1                        Certificate of Incorporation (incorporated by
                           reference from Mediconsult's Registration Statement
                           on Form S-1, filed April 2, 1999 (Registration No.
                           333-73059))

4.2                        Bylaws of the Corporation (incorporated by reference
                           from Mediconsult's Registration Statement on Form
                           10-SB, filed December 16, 1996 (File No. 333-21883))

4.3                        Mediconsult.com., Inc. 1996 Stock Option Plan, as
                           amended (incorporated by reference from Annex D to
                           Mediconsult's Registration Statement on Form S-4,
                           filed November 19, 1999 (Registration No. 333-91373))

5                          Opinion of Covington & Burling

23.1                       Consent of Covington & Burling (included in
                           Exhibit 5)

23.2                       Consent of PricewaterhouseCoopers, independent
                           auditors.

23.3                       Consent of Arthur Andersen, LLP, independent auditors
<PAGE>

                                   SIGNATURES

          Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized in the City of New York, State of New York, on this 16th day of
December, 1999.

                              MEDICONSULT.COM, INC.

                              By: /s/ Robert A. Jennings
                                 ---------------------------
                                 Robert A. Jennings
                                 Chief Executive Officer


          Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities indicated on this 16th day of December, 1999.

<TABLE>
<CAPTION>
     SIGNATURE                                        TITLE
     ---------                                        -----
<S>                                       <C>

  /s/ Robert A. Jennings                   Chairman and Chief Executive Officer
___________________________                (Principal Executive Officer)
    Robert A. Jennings

  /s/ E. Michael Ingram                    Chief Financial Officer, General
___________________________                Counsel and Secretary (Principal
    E. Michael Ingram                      Financial Officer)

  /s/ Louis Leonardelli                    Controller (Principal Accounting
___________________________                Officer)
     Louis Leonardelli

    /s/ Ian Sutcliffe                      President and Director
___________________________
      Ian Sutcliffe

    /s/ John Buchanan                      Director
___________________________
      John Buchanan

     /s/ Barry Guld                        Director
___________________________
       Barry Guld

</TABLE>
<PAGE>

                               INDEX TO EXHIBITS


 EXHIBIT
 NUMBER            DESCRIPTION
 -------           -----------

 4.1               Certificate of Incorporation (incorporated by reference from
                   Mediconsult's Registration Statement on Form S-1, filed April
                   2, 1999 (Registration No. 333-73059))

 4.2               Bylaws of the Corporation (incorporated by reference from
                   Mediconsult's Registration Statement on Form 10-SB, filed
                   December 16, 1996 (File No. 333-21883))

 4.3               Mediconsult.com., Inc. 1996 Stock Option Plan, as amended
                   (incorporated by reference from Annex D to Mediconsult's
                   Registration Statement on Form S-4, filed November 19, 1999
                   (Registration No. 333-91373))

 5                 Opinion of Covington & Burling

 23.1              Consent of  Covington & Burling (included in Exhibit 5)

 23.2              Consent of PricewaterhouseCoopers, independent auditors.

 23.3              Consent of Arthur Andersen, LLP, independent auditors
[{"type": "S-8", "sequence": "1", "description": "1996 STOCK OPTION PLAN", "secsgml_size_bytes": 8842}]
{"company-data": {"conformed-name": "MEDICONSULT COM INC", "cik": "0001016134", "assigned-sic": "7310", "irs-number": "841341886", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-92869", "film-number": "99775741"}, "business-address": {"street1": "1330 AVENUE OF THE AMERICAS", "street2": "17TH FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10019", "phone": "2128417300"}, "mail-address": {"street1": "33 REID STREET", "street2": "4TH FLOOR", "city": "HAMILTON", "state": "D0", "zip": "00000000"}}
As filed with the Securities and Exchange Commission on December 16, 1999
                                                          Registration No. 333-
===============================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.  20549
                                 ____________

                                   FORM S-8
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                                 ____________

                             MEDICONSULT.COM, INC.
            (Exact name of registrant as specified in its charter)

         Delaware                                           84-1341886
(State or other jurisdiction of                    (IRS employer identification
incorporation or organization)                     number)

                          1330 Avenue of the Americas
                           New York, New York 10019
                                (212) 841-7300
  (Address, including zip code, and telephone number, including area code, of
                   registrant's principal executive offices)

                                  ____________

                            1996 Stock Option Plan
                           (Full title of the plan)
                                  ____________

                               E. Michael Ingram
                           Chief Financial Officer,
                         General Counsel and Secretary
                             Mediconsult.com, Inc.
                          1330 Avenue of the Americas
                           New York, New York 10019
                                (212) 841-7300
                        e-mail: mingram@mediconsult.com
(Name, address and telephone number, including area code, of agent for service)

                                  ____________
                                 With Copy To:
                               Kelly Vance, Esq.
                              Covington & Burling
                          1330 Avenue of the Americas
                           New York, New York 10019
                                (212) 841-1000
                                  ____________
                        CALCULATION OF REGISTRATION FEE
Proposed Maximum    Proposed Maximum    Amount Of
Title Of Each Class Of         Amount To Be                Offering            Aggregate       Registration
Securities To Be Registered     Registered              Price Per Share     Offering Price         Fee

----------------------------------------------------------------------------------------------------------
Common Stock, $.001 par
value......................    3,500,000 shares             $8.00 (1)         $28,000,000         $7,392
----------------------------------------------------------------------------------------------------------
(1) Calculated for the additional shares being registered based upon the average
    of the high and low prices of the Common Stock on the Nasdaq National Market
    on December 13, 1999 in accordance with Rules 457(c) and 457(h) of the
    Securities Act of 1933, as amended.
PART II

              INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

         The contents of Mediconsult.com, Inc.'s Registration Statement on Form
S-8 relating to its 1996 Stock Option Plan, Registration Nos. 333-32289 and 333-
72971, filed with the Securities and Exchange Commission on July 29, 1997, and
February 26, 1999, respectively, other than the response to Item 8, are hereby
incorporated by reference.  In addition, the information listed in Item 3 is
hereby incorporated by reference herein.

Item 3.  Incorporation of Documents by Reference.

         The following additional document filed by Mediconsult with the
Securities and Exchange Commission under the Securities Act of 1933, as amended,
is hereby incorporated by reference herein:

         .     Prospectus filed November 30, 1999 pursuant to Rule 424(b)

Item 8.  Exhibits.

         The following documents are filed as exhibits to this registration
statement:

EXHIBIT NUMBER             DESCRIPTION
--------------             -----------
4.1                        Certificate of Incorporation (incorporated by
                           reference from Mediconsult's Registration Statement
                           on Form S-1, filed April 2, 1999 (Registration No.
                           333-73059))

4.2                        Bylaws of the Corporation (incorporated by reference
                           from Mediconsult's Registration Statement on Form
                           10-SB, filed December 16, 1996 (File No. 333-21883))

4.3                        Mediconsult.com., Inc. 1996 Stock Option Plan, as
                           amended (incorporated by reference from Annex D to
                           Mediconsult's Registration Statement on Form S-4,
                           filed November 19, 1999 (Registration No. 333-91373))

5                          Opinion of Covington & Burling

23.1                       Consent of Covington & Burling (included in
                           Exhibit 5)

23.2                       Consent of PricewaterhouseCoopers, independent
                           auditors.

23.3                       Consent of Arthur Andersen, LLP, independent auditors
SIGNATURES

          Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized in the City of New York, State of New York, on this 16th day of
December, 1999.

                              MEDICONSULT.COM, INC.

                              By: /s/ Robert A. Jennings
                                 ---------------------------
                                 Robert A. Jennings
                                 Chief Executive Officer

          Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities indicated on this 16th day of December, 1999.
SIGNATURE                                        TITLE
     ---------                                        -----
/s/ Robert A. Jennings                   Chairman and Chief Executive Officer
___________________________                (Principal Executive Officer)
    Robert A. Jennings

  /s/ E. Michael Ingram                    Chief Financial Officer, General
___________________________                Counsel and Secretary (Principal
    E. Michael Ingram                      Financial Officer)

  /s/ Louis Leonardelli                    Controller (Principal Accounting
___________________________                Officer)
     Louis Leonardelli

    /s/ Ian Sutcliffe                      President and Director
___________________________
      Ian Sutcliffe

    /s/ John Buchanan                      Director
___________________________
      John Buchanan

     /s/ Barry Guld                        Director
___________________________
       Barry Guld
INDEX TO EXHIBITS

 EXHIBIT
 NUMBER            DESCRIPTION
 -------           -----------

 4.1               Certificate of Incorporation (incorporated by reference from
                   Mediconsult's Registration Statement on Form S-1, filed April
                   2, 1999 (Registration No. 333-73059))

 4.2               Bylaws of the Corporation (incorporated by reference from
                   Mediconsult's Registration Statement on Form 10-SB, filed
                   December 16, 1996 (File No. 333-21883))

 4.3               Mediconsult.com., Inc. 1996 Stock Option Plan, as amended
                   (incorporated by reference from Annex D to Mediconsult's
                   Registration Statement on Form S-4, filed November 19, 1999
                   (Registration No. 333-91373))

 5                 Opinion of Covington & Burling

 23.1              Consent of  Covington & Burling (included in Exhibit 5)

 23.2              Consent of PricewaterhouseCoopers, independent auditors.

 23.3              Consent of Arthur Andersen, LLP, independent auditors