EXHIBIT 99.1

                                  CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley 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, Chief Financial Officer
of the Company, each hereby certify that, to the best of their knowledge:

1. The Company's Annual Report on Form 10-K for the period ended December 31,
2002, to which this Certification is attached as Exhibit 99.1 (the "ANNUAL
REPORT") fully complies with the requirements of section 13(a) or section 15(d)
of the Securities Exchange Act of 1934, and

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

IN WITNESS WHEREOF, the undersigned have set their hands hereto as of the 19th
day of March 2003.

/s/ Richard P. Thompson                                 /s/ Thomas C. Chesterman
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 Richard P. Thompson                                     Thomas C. Chesterman
Chief Executive Officer                                 Chief Financial Officer