EX-23 11 ex231.txt EXHIBIT 23.1 - D&T CONSENT Exhibit 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Ligand Pharmaceuticals Incorporated on Form S-3 of our report dated February 22, 2002 (which report expresses an unqualified opinion and includes an explanatory paragraph referring to a change in accounting principle), appearing in the Annual Report on Form 10-K of Ligand Pharmaceuticals Incorporated for the year ended December 31, 2001 and to the reference to us under the heading "Experts" in the Prospectus, which is part of this Registration Statement. /S/DELOITTE & TOUCHE LLP San Diego, California January 10, 2003