Three doses a day are usually taken at 8-hour intervals, usually at 7:00 a.m., 3:00 p.m. and 11:00 p.m., depending on the type of medication. Some drugs contain chemical components that can cause damage to the gastrointestinal mucosa, or gastrointestinal reactions are more serious after taking them, so they need to be taken after meals, which can be combined with the drug’s instructions to adjust the time accordingly. Secondly, some drugs can be taken on an empty stomach to facilitate absorption and give full play to their effects. Therefore, the time to take medication cannot be generalized, but must be taken in strict accordance with the drug instructions and medical advice. Antibiotics, anti-epileptic drugs, painkillers and hormones need to maintain blood concentration and should be taken in strict accordance with the time; vitamins, tonic and proprietary Chinese medicines are not strictly regulated, and can be taken before and after three meals. You should not buy and take drugs blindly to avoid long-term drug resistance and adverse reactions, which can endanger your life and health.