SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13D


                    Under the Securities Exchange Act of 1934
                                (Amendment No. 3)


                       Meridian Medical Technologies, Inc.
--------------------------------------------------------------------------------

                                (Name of Issuer)

                          COMMON STOCK, $.10 par value
--------------------------------------------------------------------------------

                         (Title of Class of Securities)

                                   589658103
--------------------------------------------------------------------------------

                                 (CUSIP Number)


       Robert G. Foster, 4 Milk Street, Portland, ME 04101 (207) 780-0904
--------------------------------------------------------------------------------
(Name, Address, Telephone  Number of Persons Authorized  to  Receive Notices and
Communications)

                                  April 1, 2002
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  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.


                                Page 1 of   Pages

--------------------------------------------------------------------------------
CUSIP No.                      13D                  Page   of   Pages
--------------------------------------------------------------------------------
     1        NAME OF REPORTING PERSON
              S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON

              Robert G. Foster

--------------------------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*        (a) [ ]
                                                                       (b) [X]

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

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

               Not Applicable
--------------------------------------------------------------------------------
     5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS              [ ]
              REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)


--------------------------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION                 United States


--------------------------------------------------------------------------------
      NUMBER OF SHARES                   7          SOLE VOTING POWER
 BENEFICIALLY OWNED BY EACH
   REPORTING PERSON WITH                                 62,142
                                ------------------------------------------------
                                         8          SHARED VOTING POWER

                                                         63,341
                                ------------------------------------------------
                                         9          SOLE DISPOSITIVE POWER

                                                         62,142
                                ------------------------------------------------
                                        10          SHARED DISPOSITIVE POWER

                                                         63,341
--------------------------------------------------------------------------------
     11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

               125,483
--------------------------------------------------------------------------------
     12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
               SHARES*                                                     [ ]


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

               2.82%
--------------------------------------------------------------------------------
     14        TYPE OF REPORTING PERSON*

               IN

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

Schedule 13D                                                    Robert G. Foster

ITEM 2.  IDENTITY AND BACKGROUND

     The  reporting  person's  name is Robert G.  Foster,  a U.S.  citizen.  The
reporting  person  is  President  and  principal   stockholder  of  Commonwealth
BioVentures,  Inc. ("CBI"),  a Massachusetts  corporation and general partner of
BioVenture   Partners   Limited   Partnership   ("BPLP"),   a  Delaware  limited
partnership,  which is the general partner of two Delaware limited partnerships,
Commonwealth BioVentures IV Limited Partnership,  a Delaware limited partnership
("Fund IV"),  and  Commonwealth  BioVentures V Limited  Partnership,  a Delaware
limited  partnership  ("Fund V"), both of which are venture  capital funds.  The
business address for the reporting person and the entities identified above is 4
Milk Street, Portland, ME 04101.

     During  the  last  five  years,  none  of the  entities  identified  in the
paragraph  above or the  reporting  person have been (i) convicted in a criminal
proceeding  (excluding  traffic  violations and similar  misdemeanors) or (ii) a
party to a civil  proceeding of a judicial or  administrative  body of competent
jurisdiction  and as a result of such  proceeding  has been or is  subject  to a
judgment,  decree or final order enjoining future  violations of, or prohibiting
or mandating  activities subject to, federal or state securities laws or finding
any violation with respect to such laws.


ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

     The  number of shares of common  stock of the  Issuer  which the  reporting
person  may be deemed to  beneficially  own is  125,483  (the  "Shares"),  which
represents  approximately  2.82% of the Issuer's reported  outstanding shares of
common  stock as of February  28, 2002.  56,800 of the Shares  represent  Shares
which the reporting  person may be deemed to have the right to acquire within 60
days.  The  reporting  person  has the sole  power to vote and the sole power to
dispose of 62,142 of the Shares.  By virtue of the  relationships  described  in
Item 2 above among the  reporting  person,  Fund IV, Fund V, BVLP,  and CBI, the
reporting  person  shares  the power to vote and  dispose  of (i)  10,484 of the
Shares  held in the name of Fund IV with Fund IV,  BVLP and CBI,  (ii) 36,297 of
the Shares  held in the name of Fund V with Fund V, BVLP and CBI and (iii) 1,490
of the Shares held in BVLP's name with BVLP and CBI. Additionally, the reporting
person shares voting and dispositive  power with respect to 15,070 shares of the
Issuer's  common  stock  held  jointly  by the  reporting  person and his former
spouse.  The reporting person ceased to be a beneficial owner of more than 5% of
the  Issuer's  common  stock  on April 1,  2002 as a result  of the  transaction
described in the paragraph below.

     Fund V, a venture  fund, is in its last year of existence and has commenced
liquidating  fund investments in contemplation of its termination and winding up
of its business. On April 1, 2002, Fund V distributed to its limited partners an
aggregate of 150,000 shares of the Issuer's common stock  registered in Fund V's
name in accordance with the terms of Fund V's limited partnership agreement (the
"Distribution").  The  Distribution was effected solely as part of the reporting
person's  investment  liquidation process and was not influenced by or otherwise
based  upon  the  reporting  person's  evaluation  of the  Issuer's  current  or
anticipated business, financial, or stock price performance.





                                    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.



April 2, 2002                                              /s/ Robert G. Foster
-------------                                              ---------------------
                                                           Robert G. Foster