Tea is not allowed to drink tea during medication, because tea is rich in tannins and tea polyphenols, which will reduce the absorption and efficacy of certain medications, enhance the side effects of medications, and make medications ineffective secondary. Such as tea polyphenols in tea, will make cardiovascular drugs such as anti-arrhythmic drug side effects increase, such as causing palpitations, tachycardia, arrhythmia, panic and so on. In addition, the ellagic acid in tea can trigger secondary failure and drug ineffectiveness when it interacts with the iron ions of certain medications such as Hong Yuan Da and Ferrous Sulfate Oral Liquid. Finally, tea is also for some Chinese medicine to play the effect of antidote, so it is not easy to drink tea during the medication.