患儿男,14天,因感冒发热服解热止痛散半包,约4小时后发现患儿鼻尖、唇发青;又服小儿退热片1片。与第1次服药相隔约16小时再服解热止痛散半包。次日晨发现患儿面部、手足青紫,体温37.2℃,呼吸40次/分,脉搏120次/分,全身皮肤呈紫灰色,以唇、指趾明显,巩膜轻度黄染。考虑药物中毒引起高铁血红蛋白血症。给1%美蓝0.5ml及VC稀释后静注,紫绀消失。患儿在16小时内服非那西丁203mg(解热止痛散每 Children male, 14 days, due to cold fever solution analgesic powder half a pack, about 4 hours after the discovery of children nose, lip hair green; and children taking a fever tablets. With the first medication about 16 hours and then antipyretic analgesic powder half a pack. The next morning found that children with facial, hand, foot and bruising, body temperature 37.2 ℃, breathing 40 beats / min, pulse 120 beats / min, body skin was purple gray, lip, thumb toe obvious, scleral mild yellow dye. Consider drug poisoning causes methemoglobinemia. To 1% methylene blue 0.5ml and VC diluted intravenously, cyanosis disappeared. Children within 16 hours of phenacetin 203mg (antipyretic analgesic powder per