The Salonpas® LIDOCAINE Pain Relieving Gel-Patch uses hydro-gel based technology and maximum strength Lidocaine available without a prescription to provide numbing relief. The Salonpas® LIDOCAINE Pain Relieving Gel-Patch provides temporary relief of pain associated with back, neck, shoulders, knees and elbows. Please note that Salonpas® LIDOCAINE Pain Relieving Gel-Patch is not indicated for post-herpetic neuralgia.