Hanging penicillin cephalosporin levofloxacin will cause digestive discomfort and bitter mouth, which is a normal phenomenon. Levofloxacin oral preparation is mainly for the treatment of infectious diseases, after consuming the reaction of bitter mouth, considering that it is the intestinal function is not good, stimulate the gastrointestinal reflux caused by the bitter mouth. If the bitter mouth and stomach discomfort can also be used with other drugs under the guidance of the doctor, usually should maintain a good daily routine, eat more fresh vegetables, eat a light diet less spicy and stimulating food, less smoking and drinking. If there are serious adverse reactions, you should consult a doctor in time, under the guidance of the doctor for treatment.