Low-concentration capsaicin patch and methods for treating neuropathic pain

Abstract

Described here are patches and methods for treating neuropathic pain. In some variations, the neuropathic pain-relieving patch comprises capsaicin or a capsaicin analog, wherein the concentration of the capsaicin or capsaicin analog is less than 1% by weight, and a penetration enhancer, wherein the patch is capable of relieving neuropathic pain over a sustained period of time. The penetration enhancer may be any suitable penetration enhancer. The patches may also include oils, viscosity increasing agents, and the like. In some variations, the pain-relieving patches comprise capsaicin, or an, wherein the concentration of the capsaicin or analog is less than 1%, and a penetration enhancer, whereby delivery of capsaicin from the patch continues for at least an hour, and whereby a single use of the patch provides a therapeutic benefit for at least one month, two months, or three months. Methods for treating neuropathic pain are also described.

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