EXHIBIT 99.1



                                  CERTIFICATION

        Pursuant to Section 906 of the Corporate Fraud Accountability Act of
2002 (18 U.S.C. Section 1350, as adopted), Richard P. Thompson, Chief Executive
Officer of Aradigm Corporation (the "Company"), and Thomas C. Chesterman, Senior
Vice President and Chief Financial Officer of the Company, each hereby certify
that, to the best of his knowledge:

        The Company's Quarterly Report on Form 10-Q for the period ended
September 30, 2002, and to which this Certification is attached as Exhibit 99.1
(the "Periodic Report), fully complies with the requirements of section 13(a) or
section 15(d) of the Securities Exchange Act of 1934, as amended, and the
information contained in the Periodic Report fairly presents, in all material
respects, the financial condition of the Company at the end of the period
covered by the Periodic Report and results of operations of the Company for the
periods covered by the Periodic Report.

        IN WITNESS WHEREOF, the undersigned have set their hands hereto as of
this 8th day of November, 2002.


                                         /s/ RICHARD P. THOMPSON
                                         ----------------------------
                                         RICHARD P. THOMPSON
                                         CHIEF EXECUTIVE OFFICER


                                         /s/ THOMAS C. CHESTERMAN
                                         ----------------------------
                                         THOMAS C. CHESTERMAN
                                         SENIOR VICE PRESIDENT AND
                                         CHIEF FINANCIAL OFFICER