Exhibit 99.4

                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350
                    AS ADOPTED PURSUANT TO SECTION 906 OF THE
                           SARBANES-OXLEY ACT OF 2002

            In connection with the quarterly report on Form 10-Q of Discovery
Laboratories, Inc. (the "Company"), for the period ended March 31, 2003 as filed
with the Securities and Exchange Commission (the "Commission') on the date
hereof (the "Report"), I, John G. Cooper, Senior Vice President and Chief
Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

      1.    the Report fully complies with the requirements of Section 13(a) or
            15(d) of the Securities Exchange Act of 1934, as amended; and

      2.    the information contained in the Report fairly presents, in all
            material respects, the financial condition and results of operations
            of the Company.

            A signed original of this written statement required by Section 906
of the Sarbanes-Oxley Act of 2002 has been provided to the Company and will be
retained by the Company and furnished to the Commission or its staff upon
request.


                           /s/ John G. Cooper
                           -------------------------------------------------
                           John G. Cooper
                           Senior Vice President and Chief Financial Officer
                           Date:  May 14, 2003