It is not recommended to eat betel nut after drinking because betel nut contains certain betel nut alkaloids and has certain histamine, betel nut alkaloids and histamine can cause alcohol overdose and even alcohol allergy to alcohol intoxication in drinkers. Because alcohol is rich in ethanol and acetaldehyde, it will lead to the phenomenon of drunkenness when the patient drinks too much, and betel nut alkaloids taken at the same time will aggravate the drunkenness and drunkenness symptoms, leading to the obvious clinical symptoms and manifestations of excessive drinking and drunkenness, and will appear nausea, vomiting, dizziness, palpitations, panic, forgetfulness, insomnia and a series of other symptoms and neurological symptoms. In addition betel nut also contains a certain amount of histamine, so there will be alcohol allergies occur, such as body rash, rash, maculopapular rash, hives, all belong to the case of drinking alcohol after eating betel nut.