The muscle relaxant Carisoprodol treats muscular stiffness, pain, and sprains caused by accidents. In addition to aiding movement and decreasing pain, it also relaxes the muscles. Your doctor will tell you how to take any medication. The dosage and duration of this medication must be followed exactly as prescribed. Dizziness, drowsiness, and vertigo may occur with Pain O soma 350 mg . The most serious side effects include seizures and liver damage.