Hangover following consumption of alcohol includes many disagreeable signs and symptoms that are suggestive of sympathetic overactivity. We performed a randomized, double-blind, crossover controlled study to assess the effect of beta blockade in preventing the symptoms of hangover. Ten subjects were randomized to receive 160 mg of a long-acting preparation of propranolol or a placebo and then participated in a controlled drinking situation. Patients were then evaluated for symptoms and signs of hangover. The results showed that although beta blockade was achieved, there was no clinically important reduction in symptoms of hangover. We conclude that propranolol does not prevent the symptoms of hangover.