It is important to prevent hangovers by avoiding the causes. If a hangover develops, the person should drink plenty of fluids, rest, and avoid activities that need mental concentration. Over-the-counter pain relievers, such as
There are few complications. Some people can stay dehydrated for as long as 48 hours if they do not make a conscious effort to drink fluids. Hangovers usually resolve easily by this time.
If headaches and stomach upset last more than 24 hours after drinking, a healthcare provider should be called.