( SAN CARLOS Calif. June 07 2007 /PRN...)NeurogesX Announces Presentation of Positive Phase 3 Clinical Data,at the Second International Congress on Neuropathic Pain Meeting,(NeuPSIG),Health

SAN CARLOS, Calif., June 07, 2007 /PRNewswire-FirstCall/ -- NeurogesX, Inc. announced today the presentation of clinical data from a positive Phase 3 trial in postherpetic neuralgia (PHN). Misha-Miroslav Backonja, M.D., Professor of Neurology at University of Wisconsin in Madison and lead academic investigator in the NeurogesX trial, plans to present the results of the study in a June 8 poster session at the Second International Congress on Neuropathic Pain in Berlin, Germany. Dr. Backonja's poster presentation is based on an abstract titled, "Localized Treatment with NGX- 4010 Significantly Reduced Pain for up to 12 Weeks: Results of A Randomized, Double-Blind, 12-Week Controlled Study in Postherpetic Neuralgia Patients."

The study evaluated the effect of a single application of NGX-4010, the Company's novel dermal patch, on pain due to PHN. The primary endpoint in this Phase 3 trial was achieved, demonstrating a statistically significant reduction in pain over an 8-week period (NGX-4010, -29.6% vs. control, -19.9%; p = 0.001). The reduction of pain was sustained over 12 weeks (NGX-4010, -29.9% vs. control, -20.4%; p=0.0016).

"The results of this pivotal Phase 3 trial demonstrate NGX-4010 is effective both alone and in combination with other neuropathic pain medications for the treatment of PHN," said Dr. Backonja. "We believe that NGX-4010's unique profile has the potential to provide a meaningful therapeutic alternative to traditional therapies that need to be taken daily, most of which have systemic side effects."

According to the Centers for Disease Control, there are approximately 1.0 million cases of shingles in the United States each year, and approximate one in five shingles sufferers go on to develop PHN. People with PHN experience pain and increased sensitivity of the skin that can persist for many years.

NeurogesX plans to complete a confirmatory Phase 3 trial in PHN in t
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