SAN MATEO, Calif., July 24 /PRNewswire-FirstCall/ -- NeurogesX, Inc. (Nasdaq: NGSX - News) announced today the preliminary results of a short-term clinical study (Study C123) of Qutenza(TM) in patients with postherpetic neuralgia (PHN) following pretreatment with an FDA-approved topical anesthetic. As part of the ongoing new drug application (NDA) review, the U.S. Food and Drug Administration (FDA) requested the study to determine whether an FDA-approved topical anesthetic would provide similar tolerability to the topical agent used as a pretreatment in the clinical development program. The NDA for Qutenza in PHN has a Prescription Drug User Fee Act (PDUFA) date of August 16, 2009.
