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. These patches contain 4% Lidocaine, long lasting and the maximum strength you can buy without a prescription. That's powerful medicine that provides targeted relief for hours. Topical pain relievers like Salonpas are recommended first-line pain treatment based on CDC & other guidelines. The targeted relief of Salonpas topical pain relievers works at the site of pain. Non-addictive Salonpas topical pain relievers are gentle on the body.