The first patent, to expire in 2024, includes claims that more specifically define the components of the liquid formulation of NGX-1998. The second, set to expire in 2022, includes claims relating to methods for removing capsaicin from the body using a surfactant-free, polyethylene glycol gel.

"The two notices of allowance strengthen our U.S. patent estate for NGX-1998," said Ronald Martell, president and CEO of NeurogesX. "Our Phase 2 data suggest that NGX-1998's product profile, including a five-minute application for up to three months of pain relief, make it an exciting advance in pain therapy. We are continuing our efforts to move into Phase 3 clinical trials as expeditiously as possible."

Related Articles on Pain Management:

Dr. Scott Glaser: 3 Concept in Interventional Pain Management to Reduce Hospitalization
Evolving Clinical Developments in Interventional Pain Management: The Mild Procedure
Nebraska Physician Group Opens Neuroscience Pain Clinic