U.S. SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Commission File Number (1-10113) FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): [X] Form 10-K [ ] Form 11-K [ ] Form 20-F [ ] Form 10-Q [ ] Form N-SAR For Period Ended: December 31, 2002 [ ] Transition Report on Form 10-K [ ] Transition Report on Form 10-Q [ ] Transition Report on Form 20-F [ ] Transition Report on Form N-SAR [ ] Transition Report on Form 11-K For the Transition Period Ended: ------------------------------------------------ Nothing in this Form shall be construed to imply that the Commission has verified any information contained herein. If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates: ---------------------------------- - -------------------------------------------------------------------------------- PART I REGISTRANT INFORMATION Full Name of Registrant HALSEY DRUG CO., INC. ----------------------------- Former Name if Applicable Address of Principal Executive Office (Street and Number) 695 No. Perryville Road - -------------------------------------------------- City, State and Zip Code Rockford , Illinois 61107 - --------------------------------------------------

PART II RULE 12b-25(b) and (c) If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate) [X] (a) The reasons described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense; [X] (b) The subject annual report or semi-annual report, transition report on Form 10-K, 11-K or Form N-SAR, or portion thereof will be filed on or before the 15th calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or portion thereof will be filed on or before the fifth calendar day following the prescribed due date; and [ ] (c) The accountant's statement or other exhibit required by Rule 12b-25(c) has been attached if applicable. PART III NARRATIVE State below in reasonable detail the reasons why the Form 10-K, 11-K, 20-F, 10-Q, N-SAR or the transition report portion thereof could not be filed within the prescribed time period. The Company is in active negotiations with its senior lenders relating to the waiver of compliance with certain covenants contained in each of the Company's term loan agreement and senior secured debentures. The results of these negotiations will determine whether the Company's term loan facility and senior secured debentures, each having a maturity date of March 31, 2006, must be reclassified as current liabilities. As a result of these negotiations, the completion of the Company's financial statements for year ended December 31, 2002 has been delayed. It is Management's belief that the negotiations with its senior lenders will be completed and the proper classification made of the Company's indebtedness in a time period that will allow for the filing of the Company's Form 10-K for the fiscal year ended December 31, 2002 on or before the 15th calendar day following its prescribed due date. PART IV OTHER INFORMATION (1) Name and telephone number of person to contact in regard to this notification: Peter Clemens, Chief Financial Officer (815) 399-2060 --------------------------------------------------------------------- (Name) (Area Code) (Telephone Number) (2) Have all other periodic reports required

under section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the [X] Yes No [ ] preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If the answer is no, please identify report(s). (3) Is it anticipated that any significant change in results of operations from the [ ] Yes No [X] corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? If so: attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

HALSEY DRUG CO., INC. (Name of Registrant as Specified in Charter) Has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized. Date: March 31, 2003 By: /s/ Peter Clemens ----------------------------------- Peter Clemens, Vice President and Chief Financial Officer