1例65岁男性患者因患重症肌无力口服溴吡斯的明片（30 mg、3次/d）、硫唑嘌呤片（75 mg、2次/d）和醋酸泼尼松片（15 mg、1次/d）治疗。2个月后患者出现腹痛伴恶心、呕吐症状。实验室检查示血脂肪酶（LPS）909 U/L、尿淀粉酶（AMS）3 838 U/L，腹部超声及影像学检查均符合胰腺炎表现。未停用上述药物，按急性胰腺炎常规方案治疗，无明显好转。发病第11天开始给予奥曲肽注射液皮下注射、注射用泮托拉唑静脉滴注、甲硝唑口服及补液、纠正水电解质紊乱等支持治疗。次日实验室检查示血LPS 3 332 U/L、血AMS 139 U/L，考虑患者的急性胰腺炎可能与硫唑嘌呤片有关，停用该药，其他治疗未变。患者症状很快缓解，4 d后复查，血LPS 546 U/L，血AMS 49 U/L。“,”A 65-year-old male patient was treated with pyridostigmine bromide tablets (30 mg thrice daily), azathioprine tablets (75 mg twice daily), and prednisone acetate tablets (15 mg once daily) for myasthenia gravis. Two months later, the patient developed abdominal pain, nausea, and vomiting. The laboratory tests showed the blood lipase (LPS) 909 U/L and the urine amylase (AMS) 3 838 U/L. The results of abdominal ultrasonography and imaging examination were consistent with the manifestations of pancreatitis. Above-mentioned drugs were not stopped and the patient was treated according to the conventional treatment regimen of acute pancreatitis. However, the symptoms did not improved significantly. On the 11th day after the onset of the disease, he received subcutaneous infusion of octreotide injection, intravenous infusion of pantoprazole sodium for injection, oral metronidazole, and supportive treatments such as fluid supplement and correction of water electrolyte disorders. The laboratoty tests the next day showed that the patient′s blood LPS was 3 332 U/L and AMS was 139 U/L. The acute pancreatitis was considered to be related to azathioprine tablets. Then the drug was stopped and other treatments were continued. The patient′s symptoms improved quickly. Four days later, LPS was 546 U/L and AMS was 49 U/L.