常用剂量静脉注射每次50~100mg,必要时5~10min后重复静注,1h内总量不宜超过300mg,有效后用1~4mg/min静滴维持。常用剂量口服100~200mg,q6~8h,维持量为100mg,一日2~3次;静注时首剂100~200mg,10min注完,必要时2~3h后重复,维持量为1~2mg/min静滴。常用剂量口服150~200mg,一日3次,维持量为100mg,一日三次;静脉应用时每次1~3mg/kg,稀释后5min内缓慢静注。常用口服剂量150~200mg,一日三次,维持量100mg,一日三 ......