Pain o soma 500mg (carisoprodol) is generally known as a muscle relaxer. The medication works by blocking the transmission of pain sensations between the brain and nerves. Painkillers like Soma 500mg are needed along with rest and physical therapy. Thus, the medication may help in the process of treating muscle conditions such as pain or injury. Pain Soma 500mg must be taken for several weeks and only for short-term use because skeletal muscle injuries generally occur for a short duration.