Metaxalone is a muscle relaxant. It works by blocking nerve impulses (or pain sensations) in the brain. Metaxalone is used together with rest and physical therapy to treat skeletal muscle conditions such as pain or injury.

Anacin is a pain reliever intended for the temporary relief of minor aches and pains. Anacin is a combination salicylate and stimulant. It works by blocking several different chemical processes within the body that cause pain, inflammation, and fever. It also reduces the tendency for blood to clot.