Diazepam is a benzodiazepine (ben-zoe-dye-AZE-eh-peens). Diazepam affects chemicals in the brain that may become unbalanced and cause anxiety. Apr 28, - Drinking alcohol may make some side effects of Valium more severe. 24 hours followed by 5 mg taken three to four times a day as needed. Feb 8, - Diazepam 5 MG Tablet is an anticonvulsant which is used to relieve the Do not stop abruptly taking this medicine as it may cause withdrawal.