It takes 1 week to drink alcohol after cephalosporin injection, this is due to the possibility of disulfiram reaction after cephalosporin injection, so it is necessary to wait for the drug to be completely eliminated from the body before it is appropriate to drink alcohol. Cephalosporins are mainly metabolized by the liver, and alcohol is also metabolized in the liver, and cephalosporins interact with ethanol, resulting in ethanol metabolism disorders, drinking alcohol after cephalosporin injection will make ethanol metabolism intermediate products of acetaldehyde accumulation in the body, which will make the organism appear tightness in the chest, shortness of breath, headache, nausea, vomiting, limb weakness, etc., and the mechanism of its action with the disulfiram similar to that of the disulfiram, and therefore called disulfiram reaction. Disulfiram reaction serious patients can appear laryngeal edema, cyanosis, dyspnea, increased heart rate, blood pressure drop, facial flushing, drowsiness, or even shock, loss of consciousness, therefore, should not drink alcohol during the taking of cephalosporin, after stopping the drug, due to the drug in the bloodstream to be discharged from the body still needs a period of time, therefore, the injection of cephalosporin needs to be 1 week before you can drink alcohol.