In general, except for tranquilizers, drinking tea cannot reduce the therapeutic effect of herbal medicines. Patients should preferably not drink tea two hours before and after taking herbal medicines, depending on the composition of the herbal medicine and the patient’s physical condition. In addition, tea is not recommended for patients with stomach problems and insomnia. Some Chinese medicines need to use tea as a medicine primer, and some need to avoid tea, so how long not to drink tea cannot be generalized. After taking Chinese medicine, it takes about 2-4 hours for it to be absorbed in the body, so patients should avoid drinking tea at this time. In addition, tea has a certain stimulating effect, if you are not sure about the medicinal properties of taking Chinese medicine, it is best to wait until the Chinese medicine is absorbed in the body before drinking tea; patients can also consult a Chinese medicine doctor to avoid conflicts between tannic acid and theophylline in tea and Chinese medicine, resulting in side effects and affecting the treatment of the disease. Patients are advised to eat a light diet during oral Chinese medicine, not to eat cold, greasy and spicy stimulating food, it is recommended to avoid drinking alcohol, eating seafood, etc.