茶叶里含有大量的鞣酸,如果用茶水送药,鞣酸将会和药物中的蛋白质、生物硷及重金属盐等起化学作用而发生沉淀,影响药物疗效,甚至失效。如惠贫血的人,常服铁刺,茶叶中的鞣酸遇到药物中的铁时,便生成另外一种新的沉淀叫“鞣酸铁”,使药物失去疗效,并刺激胃肠道引起不适,甚至会发生腹痛,腹泻等,同时茶叶中含有咖啡硷、 Tea contains a lot of tannic acid, if the tea delivery, tannic acid and drugs in the protein, alkaloids and heavy metals such as chemical precipitation and precipitation, affect the efficacy of the drug, and even failure. Anemia, such as people who often wear iron spurs, tannic acid in tea when the drug encountered in the iron, they generate another new precipitate called “tannic acid iron”, the drug loses efficacy, and stimulate the gastrointestinal tract caused by discomfort , And even abdominal pain, diarrhea, etc., while tea contains caffeine,