Tea contains a substance called manic acid, which can react with protein, alkaloids, heavy metal salts and other substances in drugs to produce precipitation, which not only affects the curative effect of drugs, but also produces some side effects. These drugs include pepsin, pancreatin tablets, multienzyme tablets, ferrous sulfate, iron fumarate and so on.
Tea also contains caffeine, theophylline and other ingredients, which can excite the nerve center. Therefore, when taking sedative, sedative, hypnotic and other drugs, such as central nervous system inhibitors such as Lumina, diazepam, Miritong, Ribenine, etc., it is not appropriate to drink tea, let alone take these drugs with tea.
You don't need to drink tea when you eat Chinese medicine, because drinking tea will cure you. Tea contains a lot of tannic acid, which is easy to precipitate substances insoluble in alkaloids. The active components of many traditional Chinese medicines are alkaloids, such as ephedrine and pseudoephedrine in ephedra, berberine in coptis and phellodendron, and Stemona. Other effective components such as Rhizoma Corydalis, Cirsium japonicum, Cirsium japonicum, Radix Cyathulae, Datura stramonium, etc. Mainly alkaloids. The decoction of these drugs is taken with tea, which will produce precipitation and affect the curative effect. At the same time, tannic acid in tea has astringent effect, which will hinder the absorption of nutrients such as protein. Therefore, drinking tea, especially strong tea, will also reduce the efficacy when taking nourishing drugs such as Dangshen, Astragalus and Yam.