Drinking plain milk after taking medication is not recommended. Usually patients taking antibiotics, antihypertensive drugs, etc. are prohibited from drinking milk after taking medication, and it is usually recommended to drink it after an interval of 1-2 hours after taking medication. Milk has the role of protecting the gastric mucosa, after drinking will be attached to the gastric mucosa, drink milk after taking medication because the gastric mucosa can not absorb the components of the drug, will affect the absorption of the drug in the body as well as the efficiency of the release of the drug. Pure milk is rich in calcium, magnesium and other minerals, milk and the combination of drugs will produce non-water-soluble substances, is not conducive to digestion and absorption by the body, and will even jeopardize human health. Antibiotic drugs will have a chemical reaction with calcium ions in milk, reducing the efficacy of antibiotics and seriously making them completely ineffective. When taking antihypertensive drugs, the enzyme that breaks down tyramine in the body will be inhibited, and the tyramine in milk will accumulate in large quantities at this time, which will lead to an increase in blood pressure, heart rate disorders, and in severe cases, a sustained increase in blood pressure, which will cause a crisis in the cardiovascular and cerebral vascular system. It is not recommended to drink milk after taking the medicine to avoid milk affecting the effect of the medicine. In special cases, consult your doctor in advance, and follow the doctor’s instructions for medication.