Valium belongs to the benzodiazepine family and is used to treat anxiety. It is used to relax muscles and also treats symptoms associated with alcohol withdrawals such as trembling or hallucinations. Valium can also be used to treat panic attacks and provide relief to patients suffering muscle spasms due to neurological ailments. This drug is also used as a sedative before medical procedures. In some cases, Valium is used to prevent bad nightmares.