Valium (diazepam) is a medication belonging to the drug class benzodiazepine. Valium is available as a generic drug. Valium is prescribed for the treatment of anxiety, seizures, muscle spasms, and symptoms of alcohol withdrawal.alium (diazepam) is a medication belonging to the drug class benzodiazepine. Valium is available as a generic drug. Valium is prescribed for the treatment of anxiety, seizures, muscle spasms, and symptoms of alcohol withdrawal.