Drinking medicine is not allowed to drink black tea, usually tea contains more tea polyphenols. Tea polyphenol is a substance that can cause secondary failure of drugs, especially for antibiotics, anti-inflammatory drugs, usually such as beta-lactam drugs, such as cephalosporins, penicillin, carbapenems will react with tea polyphenol, which will seriously reduce the effect of the drug, resulting in a significant decline in the pharmacokinetics and pharmacokinetics of drugs, will cause secondary failure of drugs. For blood and iron supplementation drugs, such as red source of tea is strictly not to drink after taking black tea, the iron of the drug will be combined with the tannic acid in the tea, so that the drug can not be further combined with iron, preventing the absorption of the elements. Anti-allergic drugs are also not to be taken at the same time with black tea, black tea in the tea polyphenols will make anti-allergic drugs, but also play a secondary failure and pharmacokinetic serious reduction in the effect of such drugs are loratadine, Sertzan, Xismin, etc..