Exhibit 99.2


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


I, Peter C. Monson, Vice President, Treasurer and Chief Financial 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 Annual Report on Form 10-K for the year ended December 31,
      2002, as filed with the Securities and Exchange Commission on March 31,
      2003 (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:    March 31, 2003                             By: /s/ Peter C. Monson
                                                        -------------------
                                                    Peter C. Monson
                                                    Vice President, Treasurer &
                                                    Chief Financial 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.