NeurogesX has successfully completed three Phase III clinical studies of Qutenza (NGX-4010) that met studies primary endpoints. Qutenza is a synthetic trans-capsaicin and drug delivery is by a rapid-delivery patch application system NeurogesX plans to launch Qutenza in the United States in the first half of November 2010.
Anesiva, another biotechnology company, has completed two Phase III trials of Adlea (ALGRX 4975), an injectable capsaicin. Adlea is promising as a pain reliever and both trials showed that Adlea's safety profile of adverse events, wound healing, and wound sensory function were similar to placebo over the study duration.