Answer by
EmmaKitty (236)
Old Valium loses potency, but doesn't "go bad" the way tetracyclines go bad. Old Valium won't hurt you, but 10 year-old 5 mg Valium will no longer be 5 mg of Valium. Depending on storage conditions (unopened/dark/cool/dry is best) that pill will contain only a percentage of its original potency.