It is generally required to stop taking cephalosporins for about a week before alcohol can be consumed. After taking cephalosporin, the body needs to wait until the drug is completely metabolized before drinking alcohol, usually about a week, but infants and elderly people need to extend the period of time, because the drug clearance half-life is usually longer than that of normal adults. Drinking alcohol after taking cephalosporin can cause a disulfiram-like reaction. Dizziness, drowsiness, hallucinations, generalized flushing, headache, nausea, vomiting, and a drop in blood pressure may occur when the drug is consumed without net metabolism. In severe cases, respiratory depression, collapse, convulsions, cardiac malfunction, and even shock may occur, which is life-threatening. Therefore, you should not drink alcohol until the drug has been metabolized in your body for about a week. The use of drugs need to be used under the guidance of a doctor, avoid self-medication, so as to avoid adverse consequences.