1例42岁男性患者,因上呼吸道感染静脉滴注地塞米松10 mg、林可霉素1.8 g、利巴韦林0.2 g及50%葡萄糖注射液100 ml。静脉滴注结束后2 h患者出现四肢无力,不能行走,四肢肌张力下降,腱反射消失。心电图示T波低平,可见u波。血钾1.7 mmol/L。诊断为低钾血症,给予口服和静脉补钾,16 h后肌力恢复正常,血钾恢复至3.8 mmol/L。 One 42-year-old male patient received intravenous drip of dexamethasone 10 mg, lincomycin 1.8 g, ribavirin 0.2 g and 50% glucose 100 ml for upper respiratory tract infection. 2 h after intravenous infusion of patients with limb weakness, can not walk, limb muscle tension decreased tendon reflex disappeared. T wave low ECG flat, visible u wave. Potassium 1.7 mmol / L. Diagnosis of hypokalemia, given oral and intravenous potassium, muscle strength returned to normal after 16 h, serum potassium recovered to 3.8 mmol / L.