〔USP〕甲氧啶，三甲氧二氨嘧啶：抗菌药和抗菌增效药，C14H18N4O3，与抗疟药乙胺嘧啶关系密切，本品供口服，与磺胺药合用则二者相得益彰，效能大增，治疗由大肠杆菌、克雷白菌-肠杆菌属、普通变形菌、奇异变形菌和摩氏变形菌所致尿路感染，以及防御机能减低儿童的卡氏肺囊虫性肺炎。有些国家单用本品治疗疟疾- protoalbumose
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