EXHIBIT 23.1 CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS We consent to the incorporation by reference in the Prospectus constituting part of the Registration Statements on Form S-3 (No. 333-76584, No. 333-69614, No. 333-52081, No. 333-72037 and No. 333-48384) and the Registration Statements on Form S-8 (No. 333-63116, No. 333-15947, No. 333-62039 and No. 333-92169) of our report dated February 15, 2002, with respect to the financial statements of Aradigm Corporation included in the Annual Report (Form 10-K) for the year ended December 31, 2001. /s/ Ernst & Young LLP Palo Alto, California March 25, 2002