Exhibit 99.1


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


I, Raymond C. Kubacki, Jr., President and Chief Executive Officer of
Psychemedics Corporation (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 Company's Quarterly Report on Form 10-Q for the quarter
                  ended June 30, 2002, as filed with the Securities and Exchange
                  Commission on August 14, 2002 (the "Report"), fully complies
                  with the requirements of Section 13(a) or 15(d) of the
                  Securities Exchange Act of 1934; and

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


Date:    August 14, 2002               By: /s/ Raymond C. Kubacki, Jr.
                                           -------------------------------------
                                           Raymond C. Kubacki, Jr.
                                           President and Chief Executive Officer


This certification accompanies this Report pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002 and shall not be deemed filed by the Company for
purposes of Section 18 of the Securities Exchange Act of 1934, as amended.