EXHIBIT 99.4

                        CERTIFICATION OF PERIODIC REPORT

I, Peter A. Clemens, the Chief Financial Officer and Vice President of Halsey
Drug Co., Inc. (the "Company"), certify, pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1)   the Annual Report on Form 10-K of the Company for the annual period ended
      December 31, 2002 (the "Report") fully complies with the requirements of
      Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C.
      78m or 78o(d)); and

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

Dated: May 6, 2003

                                                /s/ Peter A. Clemens
                                                -----------------------------
                                                Peter A. Clemens
                                                Chief Financial Officer
                                                and Vice President