Spectrum Pharmaceuticals to Host Conference Call Highlighting ROLONTIS® (eflapegrastim) Phase 3 ADVANCE Study Data Presented at Multinational Association of Supportive Care in Cancer (MASCC)

Spectrum Pharmaceuticals (NasdaqGS: SPPI), a biotechnology company with fully integrated commercial and drug development operations with a primary focus in hematology and oncology, today announced the company will hold a conference call on Friday, June 29th at 8:30 a.m. EDT/5:30 a.m. PDT to discuss the ROLONTIS Phase 3 ADVANCE study data being presented at Multinational Association of Supportive Care in Cancer (MASCC) 2018 annual meeting. The call will feature a presentation from ADVANCE study lead investigator, Lee S. Schwartzberg, M.D., FACP Professor of Medicine and Division Chief, Hematology Oncology, The University of Tennessee Health Science Center, and Executive Director, UT/West Cancer Center.

Conference Call Details

Friday, June 29, 2018 @ 8:30 a.m. Eastern/5:30 a.m. Pacific

Domestic: (877) 837-3910, Conference ID# 6798817

International: (973) 796-5077, Conference ID# 6798817

The conference call will also be webcast live. To access the webcast and additional documents related to the call, please visit the Investor Relations page of the Spectrum Pharmaceutical website at http://investor.sppirx.com/events-and-presentations.

For interested individuals unable to join the call, a webcast replay will be available online from June 29, 2018, @ 11:30 a.m. ET/8:30 a.m. PT through July 6, 2018 until 11:30 a.m. ET/8:30 a.m. PT.

Domestic Replay Dial-In #: (855) 859-2056, Conference ID# 6798817

International Replay Dial-In #: (404) 537-3406, Conference ID# 6798817

About Spectrum Pharmaceuticals, Inc.

Spectrum Pharmaceuticals is a leading biotechnology company focused on acquiring, developing, and commercializing drug products, with a primary focus in hematology and oncology. Spectrum currently markets six hematology/oncology drugs, and has an advanced stage pipeline that has the potential to transform the company. Spectrum's strong track record for in-licensing and acquiring differentiated drugs, and expertise in clinical development have generated a robust, diversified, and growing pipeline of product candidates in advanced-stage Phase 2 and Phase 3 studies. More information on Spectrum is available at www.sppirx.com.

Forward-looking statement — This press release may contain forward-looking statements regarding future events and the future performance of Spectrum Pharmaceuticals that involve risks and uncertainties that could cause actual results to differ materially. These statements are based on management's current beliefs and expectations.These statements include, but are not limited to, statements that relate to Spectrum’s business and its future, including certain company milestones, Spectrum's ability to identify, acquire, develop and commercialize a broad and diverse pipeline of late-stage clinical and commercial products, the timing and results of FDA decisions, and any statements that relate to the intent, belief, plans or expectations of Spectrum or its management, or that are not a statement of historical fact. Risks that could cause actual results to differ include the possibility that Spectrum’s existing and new drug candidates may not prove safe or effective, the possibility that our existing and new applications to the FDA and other regulatory agencies may not receive approval in a timely manner or at all, the possibility that our existing and new drug candidates, if approved, may not be more effective, safer or more cost efficient than competing drugs, the possibility that our efforts to acquire or in-license and develop additional drug candidates may fail, our dependence on third parties for clinical trials, manufacturing, distribution and quality control and other risks that are described in further detail in the company's reports filed with the Securities and Exchange Commission. The company does not plan to update any such forward-looking statements and expressly disclaims any duty to update the information contained in this press release except as required by law.

SPECTRUM PHARMACEUTICALS, INC.® and ROLONTIS® are registered trademarks of Spectrum Pharmaceuticals, Inc and its affiliate. REDEFINING CANCER CARE™ and the Spectrum Pharmaceuticals logos are trademarks owned by Spectrum Pharmaceuticals, Inc. Any other trademarks are the property of their respective owners.

© 2018 Spectrum Pharmaceuticals, Inc. All Rights Reserved

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