Pain-O-Soma 500 mg or generic Soma belongs to the group of medicine known as muscle relaxer This medicine works by blocking the pain sensation that arises between nerves and brain The medicine is used along with physical therapy for treating injury and various other types of painful musculoskeletal conditions Generic Soma should be taken only if doctor has prescribed for it The medicine should not be shared with other person The medicine should not be stopped suddenly as it might cause withdrawal symptoms.