( Ozarelix improved LUTS symptoms and uri...)AEterna Zentaris' Partner, Spectrum, Discloses Detailed Phase 2,Data for Ozarelix, in BPH at Annual AUA Meeting,Health

QUEBEC CITY, May 23, 2007 /PRNewswire-FirstCall/ - AEterna Zentaris Inc. , a global biopharmaceutical company focused on endocrine therapy and oncology, today announced that its partner Spectrum Pharmaceuticals presented an abstract outlining detailed Phase 2 results for AEterna Zentaris' fourth-generation luteinizing hormone-releasing hormone (LHRH/GnRH) antagonist, ozarelix, in benign prostatic hyperplasia (BPH). Results indicate that ozarelix was well tolerated and demonstrated statistically significant as well as clinically meaningful efficacy in the treatment of lower urinary tract symptoms (LUTS) secondary to BPH. Results also showed no statistically significant impact on quality of life or erectile function. The abstract was presented yesterday afternoon at the American Urological Association (AUA) Annual Meeting being held this week at the Anaheim Convention Center in Anaheim, California.

"We are encouraged by these data with ozarelix and look forward to seeing further results from the fully-enrolled Phase 2b trial, said David J. Mazzo, Ph.D., President and CEO of AEterna Zentaris. "With cetrorelix in an ongoing Phase 3 program and ozarelix completing a Phase 2b trial this year, we are fortunate to be leading the LHRH antagonist class with two very promising compounds for the treatment of BPH."

Details

The abstract #93629 (Poster #1552) titled, "The efficacy and safety of ozarelix, a novel GnRH antagonist in men with lower urinary tract symptoms (LUTS) due to benign prostatic hyperplasia (BPH)" reviewed results of a randomized, double-blind, placebo-controlled, multi-center, dose-ranging Phase 2 trial in BPH.

Ozarelix was given intramuscularly (IM) to men with moderate to severe LUTS due to BPH, to assess the compound's efficacy and safety. Eligible patients were treated with placebo for 4 weeks to establish b
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