患者女,72岁,2011年7月3日因腹壁疝手术在外院住院2 d出院。2011年7月5日因静脉炎,自服甲磺酸左氧氟沙星片(北京双鹤药业股份有限公司,批号:110219)0.1 g,po bid,8 d后出现腹泻,大便7～8次/d,为成形便,表面附着黏液脓样物,伴腹痛、里急后重,便后腹痛可缓解,无发热、畏寒、寒战,无恶心、呕吐、腹胀、便血,停用甲磺酸左氧氟沙星 Female patient, 72 years old, July 3, 2011 Hospital discharge due to abdominal hernia surgery 2 d discharged. July 5, 2011 due to phlebitis, self-serving levofloxacin tablets (Beijing Double-Crane Pharmaceutical Co., Ltd., batch number: 110219) 0.1 g, po bid, 8 d after the emergence of diarrhea, stool 7 to 8 times / d , For the formation of it, the surface adhesion of mucopurulent like material, with abdominal pain, tenesmus, then abdominal pain can be relieved, no fever, chills, chills, no nausea, vomiting, bloating, blood in the stool, disabled levofloxacin mesylate