The headaches stomach upset and general ill feeling of a hangover can be relieved by neem tea. Neem "resets" the blood glucose levels, opens constricted blood vessels, reduces blood pressure, and counteracts the body's reaction to the alcohol. For relief after drinking excessive amounts of alcohol, drink a cup of a hot neem tea made with ten neem leaves. Anecdotal reports seem to indicate that taking neem daily in advance of a party works very well as a preventative.