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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D/A

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)*


                       Healthcore Medical Solutions, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                              Class A Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    42220B101
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                                Adam D. Eilenberg
                    Ehrenreich Eilenberg Krause & Zivian LLP
                         11 East 44th Street, 17th Floor
                              New York, N.Y. 10017
                                 (212) 986-9700
- --------------------------------------------------------------------------------
                 (Name, Address and Telephone Number of Person
               Authorized to Receive Notices and Communications)


                                 January 6, 1999
- --------------------------------------------------------------------------------
                      (Date of Event which Requires Filing
                               of this Statement)

If the filing person has previously  filed a statement of Schedule 13G to report
the  acquisition  which is the subject of the  Schedule  13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13d-1(a) for other  parties to whom copies are to be
sent.

*The  remainder  of this cover page shall be filed out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

                        (Continued on following page(s))





CUSIP No.   42220B101                 13D


- --------------------------------------------------------------------------------
   1   NAME OF REPORTING PERSON
       S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON



                           SIGA Pharmaceuticals, Inc.
- --------------------------------------------------------------------------------
   2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [ ]
                                                             (b)  [ ]


- --------------------------------------------------------------------------------
   3   SEC USE ONLY




- --------------------------------------------------------------------------------
   4   SOURCE OF FUNDS*



                                       WC
- --------------------------------------------------------------------------------
   5   CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO 
       ITEMS 2(d) OR 2(e)                                         [  ]


- --------------------------------------------------------------------------------
   6   CITIZENSHIP OR PLACE OF ORGANIZATION


                                       DE
- --------------------------------------------------------------------------------
                  7    SOLE VOTING POWER
   NUMBER OF           300,800 (including 149,800 Warrants     
     SHARES                     exercisable at $6.50 per share)
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      8    SHARED VOTING POWER
      EACH             0
   REPORTING      --------------------------------------------------------------
     PERSON       9    SOLE DISPOSITIVE POWER
      WITH             300,800 (including 149,800 Warrants 
                                exercisable at $6.50 per share)
                  --------------------------------------------------------------
                  10   SHARED DISPOSITIVE POWER
                       0


- --------------------------------------------------------------------------------
  11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       300,800 (including 149,800 Warrants exercisable at $6.50 per share)
- --------------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

                                                                      [  ]

- --------------------------------------------------------------------------------
  13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

       
     5.003% (taking into account only shares of Common Stock; 9.50% if also
           including 149,800 Warrants exercisable at $6.50 per share)
- --------------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*

       

                                       CO
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!



CUSIP No.  42220B101                   13D                   

                                  Schedule 13D


Item 1. Security and Issuer

This  statement  relates to the Class A Common  Stock,  $.01 par value  ("Common
Stock"),  of Healthcore  Medical Solutions,  Inc. (the "Issuer"),  which has its
principal executive office at 11904 Blue Ridge Boulevard, Grandview, MO 64030.

This  statement is filed  pursuant to Rule  13d-2(a)  with respect to securities
owned by the reporting person specified herein as of January 11, 1999 and amends
the Schedule 13 D filed on October 15, 1998 (the "Schedule 13D").  Except as set
forth herein, the Schedule 13D is hereby restated in its entirety.

Item 4. Purpose of Transaction

The  Reporting  Person  acquired  the  shares of Common  Stock and the Units for
investment  purposes.  After a  meeting  with the  Chairman  of the Board of the
Issuer and several  discussions,  the Reporting Person on January 6, 1999 sent a
letter to the  Chairman of the Board  suggesting a possible  combination  of the
Issuer and the  Reporting  Person and  outlining  the terms of a possible  share
exchange transaction.  The Reporting Person also sought the Chairman's reactions
to such outline. No formal offer was made by the Reporting Person to acquire the
Issuer.

While the Reporting  Person has no present  intention to purchase any additional
shares of Common Stock or Units,  it may,  depending  upon its evaluation of the
Issuer's business and prospects, determine to increase or decrease or dispose of
its  position in the Issuer.  In making any such  determination,  the  Reporting
Person will also take into consideration other available business  opportunities
and general economic conditions.




Signature


     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.


Date:  January 11, 1999

                                           SIGA PHARMACEUTICALS, INC.

                                           By: /s/ JUDSON A. COOPER
                                              ----------------------------------
                                               Name:  Judson A. Cooper
                                               Title: Chairman of the Board