You should not drink beer after taking cephalosporin because it may trigger a disulfiram-like reaction. After taking cephalosporin antibiotics, if there is alcohol consumption within a week, alcohol and cephalosporin interact with each other and may produce a disulfiram-like reaction, dizziness, fatigue, hallucinations, generalized redness, headache, nausea, vomiting, drop in blood pressure, or even shock, which can be a serious and life-threatening symptom. Although beer does not contain a high concentration of alcohol, a small amount of alcohol may also trigger a disulfiram-like reaction. To be on the safe side, you should not drink any beverages containing alcohol, including liquor, beer, red wine, etc. after taking cephalosporin. It is best not to drink alcohol for a week before or after taking the medication, as it takes time for Cephalosporin to finish metabolizing in the body. If you accidentally drink alcohol after taking cephalosporin, you should pay attention to observe the changes in the body, if there are symptoms similar to the disulfiram-like reaction to consult a doctor in time for examination and treatment, do not leave it alone and delay the condition.