The things you should not consume after cephalosporin are as follows: First of all, alcohol includes liquor, beer, fruit wine and all drinks containing alcohol. It also includes medicines containing alcohol, such as patchouli and patchouli liquid. Then there are foods containing alcohol, such as alcoholic chocolate, whose all can produce a disulfiram-like reaction with cephalosporin antibiotics. Secondly, be careful not to eat seafood after cephalosporin, such as fish, shrimp, crab, etc., and also foods that can easily cause allergies, such as eggs and milk. If the patient is allergic and takes the above-mentioned foods, he or she may have an allergic reaction, such as a rash around the body. It is not possible to distinguish whether the allergic reaction is caused by food or by cephalosporin, and its result will delay the disease and affect the medication.