陈××,女,40岁。于1981年3月22日起因轻度贫血,给每日肌注长效维生素B_(12)0.25mg,注射第七次时患者感注射侧大腿活动不灵活,约10分钟后肌注部出现红肿,一小时后下肢麻木有蚁走感,逐渐上延至胸部,出现胸闷,恶心,呕吐四次,皮肤见散在荨麻疹。继之呼吸困难,口唇紫绀,四肢抽搐。立即给予对症处理及氢化考的松75毫克加入50%葡萄糖液40毫升静脉缓推。20分钟后症状缓解,一小时后症状 Chen × ×, female, 40 years old. In March 22, 1981 due to mild anemia, intramuscular injection of long-acting vitamin B_ (12) 0.25mg, the injection of the seventh injection of the patient side of the injection side of the thigh activity is not flexible, about 10 minutes after the muscular injection of redness One hour later, the numbness of the lower extremity had a sense of walking away from the ants and gradually extended to the chest with chest tightness, nausea and vomiting four times. The skin was seeded with scattered urticaria. Followed by breathing difficulties, cyanotic lips, limbs convulsions. Immediate symptomatic treatment and hydrocortisone 75 mg added 50% glucose solution 40 ml intravenous push. Symptoms were relieved 20 minutes later, symptoms one hour later