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Ozarelix Phase 2 Data in Benign Prostatic Hypertrophy Presented at,Annual Meeting of American Urological Association

* Ozarelix Effective in Improving Symptoms and Urine Flow, With Long Lasting Effect in Phase 2 Study

IRVINE, Calif., May 23, 2007 /PRNewswire-FirstCall/ -- Spectrum Pharmaceuticals, Inc., today announced Phase 2 safety and efficacy data for ozarelix, the Company's drug candidate for the treatment of benign prostatic hypertrophy (BPH), at the American Urology Association Annual Meeting held at the Anaheim Convention Center in Anaheim, California on Tuesday, May 22, 2007.

"The results of this study indicate a significant and sustained degree of benefit, higher than what is usually seen with current treatments of BPH," said Rajesh C. Shrotriya, M.D., Chairman, President and Chief Executive Officer of Spectrum Pharmaceuticals. "We have recently completed enrollment in a Phase 2b study in the U.S. Once we have preliminary results from this Phase 2b trial, we plan to begin a Phase 3 trial, which we expect to begin later this year. Results from the Phase 2b trial will aid in the design of the Phase 3 trial. We believe that ozarelix could help serve the large unmet medical need for more effective BPH treatments."

The efficacy and safety of ozarelix, a GnRH antagonist, given intramuscularly (IM) was assessed in men with moderate to severe Lower Urinary Tract Symptoms (LUTS) due to BPH in a randomized, double-blind, placebo- controlled, multi-center, Phase 2 dose-ranging study.

Patients (N=144) meeting the inclusion criteria were randomly allocated to one of five treatment groups:

    Group 1:  placebo,

    Group 2:  5mg ozarelix on Day 1 + 5mg ozarelix on Day 15;

    Group 3:  10mg ozarelix on Day 1 +10mg ozarelix on Day 15;

    Group 4:  15mg ozarelix on Day 1 + 15mg ozarelix on Day 15; and,

    Group 5:  20mg ozarelix on Day 1 only.

Study participants were followed for six months. The primary efficacy endpoint was a change in the International Prostate Symposium Score (IPS S) at 12 weeks compared to baseline. Secondary efficacy endpoints included changes in IPSS Quality of Life (QoL), patients with >/= 30% and >/= 40% improvement in IPSS, uroflow values (Qmax), PVR and prostate volume. Safety analysis included changes in sexual function (IIEF-5), treatment emergent AEs, lab values (including testosterone, PSA) and vital signs. Mean age was 69.1 (range 52 - 85), IPSS 19.8, Qmax 9.7 mL/sec and prostate size (cm3) 41.6 at baseline.

The effects developed rapidly, with noticeable activity at four weeks from starting treatment, were maximal at 12-16 weeks, and persisted for the entire six-month observation period. At 12 weeks all ozarelix-treated groups showed improvement with the greatest improvement in the 15mg +15mg group. Change from baseline vs. placebo in IPSS was 8.5; peak urine flow change from baseline vs. placebo was 4.7; T levels declined transiently, and returned to baseline in most subjects by 4 weeks and all subjects by 6 weeks following dosing. Based on IIEF, there was no effect seen on erectile function.

Ozarelix was well tolerated and demonstrated statistically significant and clinically meaningful efficacy in the treatment of LUTS secondary to BPH. Serious Adverse Events were reported in 4 patients but were not considered treatment related. No systemic allergic reactions were seen, and the injections were well tolerated.

About Ozarelix and Development Alliance with AEterna Zentaris

Ozarelix is a fourth generation Luteinizing Hormone Releasing Hormone (LHRH) antagonist administered as an intramuscular injection. In August 2004, Spectrum received an exclusive license from AEterna Zentaris to develop and market ozarelix for all potential indications in North America (including Canada and Mexico) and India.

In addition, Spectrum will receive 50 percent of any upfront and milestone payments, royalties and/or profits from sales of the product in Japan. Japanese rights for all potential oncology indications have recently been licensed to Nippon Kayaku, a key player in the Japanese oncology market.

Spectrum is developing ozarelix for benign prostatic hypertrophy (BPH), hormone-dependent prostate cancer and other indications.

About Benign Prostatic Hypertrophy

Benign prostatic hypertrophy is a non-cancerous enlargement of the prostate frequently occurring in men over the age of 50. According to the National Institutes of Health, BPH affects more than 50% of men over the age of 60 and as many as 90% of men over the age of 70 and it is estimated that there are currently more than 28 million men suffering from BPH in the United States.

The IPSS (also known as AUA symptom index) is a standardized scoring system that evaluates the seven principal symptoms of BPH. The enlargement can result in the gradual squeezing of the urethra, resulting in increased frequency or difficulty in urinating. Treatment options for BPH include surgery and medications to reduce the amount of tissue and increase the flow of urine. Current treatment options have limited efficacy, leading to inadequate compliance. Medications currently available belong to two classes: alpha blockers (such as FLOMAX(R)[1], CARDURA(R)[2] and HYTRIN(R)[3]) which relax the muscles in the neck of the bladder and in the prostate, but have no direct effect on the prostate growth itself, and alpha reductase inhibitors (such as PROSCAR(R)[4] and AVODART(R)[5]), which can result in some reduction of the prostate size but have a very slow onset of action, and may be associated with impotence and decreased libido.

About Spectrum Pharmaceuticals

Spectrum Pharmaceuticals acquires, develops and commercializes a diversified portfolio of oncology drug candidates that meet critical health challenges for which there are few other treatment options. Spectrum's expertise lies in identifying undervalued drugs with demonstrated safety and efficacy, and adding value through further clin ical development and selection of the most viable and risk-reduced methods of commercialization. The company's pipeline includes promising early and late-stage drug candidates with unique formulations and mechanisms of action that address the needs of seriously ill patients, such as at-home chemotherapy and new treatment regimens for refractory disease. For more information, please visit our website at

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 include but are not limited to statements that relate to our business and its future, Spectrum's ability to identify, acquire, develop and commercialize its portfolio of drug candidates, the Company's promising pipeline, our team's ability to identify promising drugs and move these drugs through development and toward commercialization, that we will begin the Phase 3 trial with ozarelix in the second half of this year, the safety and efficacy of ozarelix, that we believe that ozarelix could help serve the large unmet medical need for more effective BPH treatments 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 our existing and new drug candidates, may not prove safe or effective, the possibility that our existing and new drug candidates may not receive approval from the FDA, and other regulatory agencies 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 lack of revenues, our limited marketing experience, 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. We do not plan to update any such forward-looking statements and expressly disclaim any duty to update the information contained in this press release except as required by law.

    COMPANY CONTACTS                        MEDIA CONTACT

    Russell Skibsted                        Susan Neath

    SVP & Chief Business Officer            Porter Novelli Life Sciences


    Paul Arndt

    Manager, Investor Relations


    [1] FLOMAX is a registered trademark of Boehringer Ingelheim

    [2] CARDURA is a registered trademark of Pfizer, Inc.

    [3] HYTRIN is a registered trademark of Abbott Laboratories

    [4] PROSCAR is a registered trademark of MERCK & CO., Inc.

    [5] AVODART is a registered trademark of GlaxoSmithKline

CONTACT: Russell Skibsted, SVP & Chief Business Officer, or Paul Arndt,Manager, Investor Relations, both of Spectrum Pharmaceuticals, Inc.,+1-949-788-6700; or Susan Neath of Porter Novelli Life Sciences,+1-619-849-6007, for Spectrum Pharmaceuticals, Inc.

Web site:

Ticker Symbol: (NASDAQ-NMS:SPPI)

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