SALONPAS Pain Relief Patch is the first and only OTC topical pain patch for the temporary relief of mild to moderate muscle and joint pain and pain associated with arthritis, sprains, strains, bruises and simple back pain. SALONPAS Pain Relief Patch provides effective pain relief for up to 12 hours. SALONPAS Pain Relief Patch contains two powerful pain-relieving ingredients, menthol and methyl salicylate (an NSAID - a non-steroidal anti-inflammatory agent).