Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement on Form S-8 of our reports dated March 14, 2017, relating to the consolidated financial statements and financial statement schedule of Spectrum Pharmaceuticals, Inc., and the effectiveness of Spectrum Pharmaceuticals, Inc.’s internal control over financial reporting, appearing in the Annual Report on Form 10-K of Spectrum Pharmaceuticals, Inc. for the year ended December 31, 2016.
/s/ Deloitte & Touche LLP
Costa Mesa, California
March 14, 2017