Researchers have now seen in a study patients with post-shingles pain that capsaicin acts on pain-responsive pain fibers. In the study, participants were treated with the capsaicin patch showed 33 ...

Medically reviewed by Femi Aremu, PharmD Lidocaine patches are in a drug class called local anesthetics that relieve pain in a small area of your body. Lidocaine patches are available either by ...