It is better not to drink beer after taking cephalosporin, if you need to drink beer it is recommended to at least one week later, the specific circumstances to consult the doctor shall prevail. Cephalosporin belongs to the antibiotic, cephalosporin antibiotics in the body will act with alcohol to occur a series of chemical reactions, resulting in alcohol metabolites acetaldehyde in the body a large number of accumulation of acetaldehyde, acetaldehyde can cause poisoning. After acetaldehyde poisoning, patients will experience a series of systemic adverse reactions such as facial and generalized skin redness, dizziness, nausea, vomiting, chest pain, and in severe cases, even convulsions, incontinence, and even threaten human life. The adverse reactions of taking Cephalosporin alone include allergy, nausea, vomiting, diarrhea, etc. However, the probability of the occurrence of the above mentioned adverse symptoms is generally low when taken under the guidance of a doctor. Cephalosporin should not be used with caution in the following groups of people: those who are allergic to penicillins; those with severe renal dysfunction; and those with a history of gastrointestinal disorders. In conclusion, it is forbidden to drink alcohol during the metabolism of Cephalosporin in the body, and if you drink alcohol inadvertently and experience the above symptoms, you should go to the hospital for examination in time.