Multicenter Study
Effectiveness of the lidocaine patch 5% on pain qualities in three chronic pain states: assessment with the Neuropathic Pain Scale.
Curr Med Res Opin. 2004 Jan 1;20 Suppl 2:S21-8.
Randomized Controlled Trial
NGX-4010, a capsaicin 8% dermal patch, administered alone or in combination with systemic neuropathic pain medications, reduces pain in patients with postherpetic neuralgia.
Clin J Pain. 2012 Feb 1;28(2):101-7.
Randomized Controlled Trial
NGX-4010, a high-concentration capsaicin patch, for the treatment of postherpetic neuralgia: a randomised, double-blind study.
Lancet Neurol. 2008 Dec 1; 7 (12): 110611121106-12.