The risk of drinking alcohol after taking drugs is great, in addition to affecting the absorption of drugs, but also bring serious harm to the body, there are the following types of drugs and alcohol adverse reactions more: first, antipyretic and analgesic drugs, such drugs have obvious damage to the gastrointestinal tract, if coupled with alcohol, it is very likely to induce gastrointestinal bleeding. Second, sedative-hypnotic drugs, general sedatives taken in small doses, there is no significant effect on the human body, but taken with alcohol, it can make the nerve center deeply inhibited, may induce coma, or even death, there are such reactions and anti-allergy drugs. Third, antibacterial drugs, such as cephalosporins, furazolidone, metronidazole and other drugs, can cause disulfiram-like reactions, the patient will have a headache, dizziness, palpitations, chest tightness, breathing difficulties, blood pressure drop and a series of reactions, and even life-threatening. Fourth, there are some drugs, such as hypoglycemic drugs, antiepileptic drugs, anti-angina drugs, antihypertensive drugs, hemostatic drugs, anticoagulants, diuretics, antidepressants, anti-tuberculosis drugs, etc., drinking alcohol after taking drugs, may occur in varying degrees of adverse reactions.