CONSENT OF INDEPENDENT ACCOUNTANTS
We hereby consent to the incorporation by reference in this Amendment No. 1 to the Registration Statement on Form S-3 of our reports dated February 3, 2003 relating to the consolidated financial statements and financial statement schedule, which appear in Aerogen, Inc.'s Annual Report on Form 10-K for the year ended December 31, 2002. We also consent to the reference to us under the heading "Experts" in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
San Jose, California
November 11, 2003