Exhibit 10.31


                              WAIVER AND AMENDMENT


        This WAIVER AND AMENDMENT is made and entered into as of October 15,
1998, by and between MERIDIAN MEDICAL TECHNOLOGIES, INC., a Delaware corporation
(the "Company") and NOMURA HOLDING AMERICA INC., a Delaware corporation
(together with its successors, assigns and transferees, the "Purchaser").

                                    RECITALS

         WHEREAS, the Company and the Purchaser have entered into that certain
Note and Warrant Purchase Agreement (the "Purchase Agreement") dated as of April
30, 1998; capitalized terms used herein but not defined herein shall have the
meanings assigned thereto in the Purchase Agreement;

        WHEREAS, the Company and the Purchaser have agreed to amend the Purchase
Agreement on the terms and conditions set forth herein;

         NOW, THEREFORE, the Company and the Purchaser agree as follows:

         SECTION 1. Waiver. On the Amendment Effective Date (as defined below),
the Purchaser shall be deemed to have waived, as of the Closing Date, any breach
of the Company's representations and warranties set forth in the Purchase
Agreement that existed on the Closing Date. Nothing herein shall be deemed to
waive any breach of such representations and warranties that arose or came into
existence after the Closing Date.

         SECTION 2. Amendment to Section 1.1. Section 1.1 of the Purchase
Agreement is hereby amended by replacing the definition of "EBITDA" with the
following:

                  "EBITDA" means, for any period, an amount equal to Net Income
         plus (to the extent deducted in determining Net Income) interest
         expense, provisions for income taxes, depreciation, amortization of
         intangible assets and the write-off of in-process research and
         development expense, in each case for the Company and its Subsidiaries
         on a consolidated basis; provided, that (a) any calculation of EBITDA
         that takes into account the fourth quarter of the Company's 1997 Fiscal
         Year shall exclude from such calculation the $1,539,400 pre-tax charge
         incurred during the fourth quarter of the Company's 1997 Fiscal Year,
         which charge is related to the voluntary product exchange program
         instituted during such period, (b) any calculation of EBITDA shall
         exclude any extraordinary item associated with the extinguishment of
         Indebtedness as a result of any refinancing of all or any part of the
         Indebtedness evidenced by the Estate Subordinated Note or the Junior
         Subordinated Note or the obligations under the Senior Loan Documents,
         (c) any calculation of EBITDA that takes into account the third quarter



         of the Company's 1998 Fiscal Year shall exclude from such calculation
         the $2,244,000 pre-tax charge incurred during such third quarter of the
         Company's 1998 Fiscal Year, which charge is related to the EpiPen(R)
         product recall announced in May 1998, (d) any calculation of EBITDA
         that takes into account the fourth quarter of the Company's 1998 Fiscal
         Year shall exclude from such calculation the $500,000 pre-tax charge
         incurred during such fourth quarter of the Company's 1998 Fiscal Year,
         which charge is related to the revision of the estimated costs of the
         EpiPen(R) product recall, and (e) any calculation of EBITDA that takes
         into account the fourth quarter of the Company's 1998 Fiscal Year shall
         exclude from such calculation the $166,000 pre-tax charge incurred
         during such fourth quarter of the Company's 1998 Fiscal Year, which
         charge is related to the amendment to the Warrants amending the
         exercise price thereunder from $11.988 to $7.50 per share of Common
         Stock that may be purchased under the Warrants.

         SECTION 3. Amendment to Section 10.1. Section 10.1 of the Purchase
Agreement is hereby amended by deleting clause (d) and replacing it with the
following:

                  (d) Additional Permitted Indebtedness, provided that the
         Company shall not, and shall not permit any of its Subsidiaries to
         incur, create, assume, guarantee or in any way become liable for, or
         permit to exist, any such Additional Permitted Indebtedness prior to
         October 15, 1999;

         SECTION 4. Amendment of Warrants. The Company and the Purchaser hereby
agree to enter into an amendment to the Warrants, in form and substance
satisfactory to the Purchaser (the "Warrant Amendment") pursuant to which the
exercise price thereof shall be amended to be $7.50 per share (subject to
adjustment as provided therein).

         SECTION 5. Continuing Effectiveness of Purchase Agreement. Except as
expressly provided herein, no other provision of the Purchase Agreement is
amended hereby. The Purchase Agreement, as amended hereby, is and shall continue
in full force and effect in accordance with the provisions thereof, and this
Waiver and Amendment shall not by implication or otherwise limit, impair,
constitute a waiver of, or otherwise affect the rights and remedies of the
Purchaser under the Purchase Agreement. This Waiver and Amendment shall be
effective only in the specific instances and for the purpose for which it is
given and shall be limited precisely as written and shall not constitute a
waiver of any other provision of the Purchase Agreement or a waiver of the
Purchase Agreement for any other purpose or for any other period.

         SECTION 6. Cost and Expenses. The Company agrees to pay all
out-of-pocket expenses of the Purchaser for the negotiation, preparation,
execution and delivery of this Waiver and Amendment (including fees and expenses
of Stroock & Stroock & Lavan LLP, counsel to the Purchaser),



         SECTION 7. Effectiveness. This Waiver and Amendment shall become
effective on the date (the "Amendment Effective Date") when each of the
following conditions have been satisfied:

                  (a) a copy of this Waiver and Amendment shall have been duly
                  executed by each of the Company and the Purchaser and
                  delivered to the Purchaser;

                  (b) a copy of an amendment to the Credit Agreement shall have
                  been duly executed and delivered by each of the Company and
                  ING, as agent and lender, in the form of Exhibit A hereto; and

                  (b) a copy of the Warrant Amendment shall have been duly
                  executed by each of the Company and the Purchaser and
                  delivered to the Purchaser.

         SECTION 8. Headings. The various headings of this Waiver and Amendment
are inserted for convenience only and shall not affect the meaning or
interpretation of this Waiver and Amendment or any provision hereof.

         SECTION 9. Counterparts. This Waiver and Amendment may be executed in
two or more counterparts, each of which shall be deemed an original but all of
which shall together constitute one and the same instrument.

         SECTION 10. References. From and after the Amendment Effective Date,
the term "this Agreement" and the expressions "hereunder" and "herein", and
words of similar import when used in or with respect to the Purchase Agreement
shall mean the Purchase Agreement as amended by this Waiver and Amendment.

         SECTION 11. Governing Law. THIS WAIVER AND AMENDMENT SHALL BE GOVERNED
BY AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW
YORK.

and words of Similar import when used in or with respect to the Warrant shall
mean the warrant as amended by this Amendment.

         SECTION 6. Governing Law. THIS AMENDMENT SHALL BE GOVERNED BY
AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH THE LAWS OF
 THE STATE OF NEW YORK.




         IN WITNESS WHEREOF, the Issuer and the Holder have caused this
Amendment to be executed by their duly authorized officers as of the date first
written above.



                                            MERIDIAN MEDICAL TECHNOLOGIES, INC.


                                            By:    /S/ JAMES H. MILLER
                                                 -------------------------------
                                                 Its:  President/CEO


                                            NOMURA HOLDING AMERICA, INC.


                                            By:    /S/ SALVATORE GENTILE
                                                 -------------------------------
                                                 Its:  Attorney-in-fact