Doan's Maximum Strength Caplets provide effective pain relief for aching backs. Each caplet contains a pain reliever called Magnesium Salicylate Tetrahydrate, a nonsteroidal anti-inflammatory drug (NSAID). There are many reasons why back pain can occur, but the most common are muscle and ligament strains and arthritis. Those suffering from backaches often describe their symptoms as follows: Dull ache or pain in lower back, Discomfort while moving around, walking or standing, Soreness to the touch, Backache sufferers may find back pain relief from OTC pain relievers, such as Doan's Maximum Strength Caplets. Adults experiencing back pain should take 2 caplets with a full glass of water every 6 hours, not to exceed 8 caplets in 24 hours.* *Children under 12 years: do not use Doan's Extra Strength Caplets unless directed by a doctor. **Provides temporary relief. Use as directed. See Drug Facts.