1 EXHIBIT 23.1 ARONEX PHARMACEUTICALS, INC. AND SUBSIDIARIES CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 10-K, into the Company's previously filed Registration Statements on Form S-8 dated August 18, 1992, June 7, 1994, December 31, 1997 and August 20, 1999 and Form S-3 dated June 20, 2000 and November 15, 2000. ARTHUR ANDERSEN LLP March 27, 2001 Houston, Texas