Percogesic Backache Relief is a fast acting formula that helps to relieve backaches and without a prescription Formulated with Magnesium salicylate, a nonsteroidal anti-inflammatory drug (NSAID) that reduced back and muscular aches Effective oral analgesic for enhanced pain relief; Easy to swallow coated tablets Take 2 tablets every 6 hours while symptoms persist; Safe for adults and children 12 years and over Pharmacist Recommended; FSA/HSA eligible item in the USA