Soma (carisoprodol) is a muscle relaxer that blocks pain sensations between the nerves and the brain. Soma is used together with rest and physical therapy to treat skeletal muscle conditions such as pain or injury. Carisoprodol, marketed under the brand name Soma among others, is a medication used for musculoskeletal pain. It is only approved for up to three weeks. Effects generally begin within half an hour and last for up to six hours. It is taken by mouth. Common side effects include headache, dizziness, and sleepiness.