Cold medicine is recommended to be taken half an hour after meals, easy to eat on an empty stomach to cause gastrointestinal discomfort, general cold medicine are compounded drugs, containing many kinds of drugs that are irritating to the stomach mucosa, anti-inflammatory, antiviral. For example, paracetamol or antibiotics, etc., taken after meals to avoid stimulation of the stomach, aggravating the physical condition. At the same time, half an hour after the meal, the stomach and intestines are in the process of peristaltic digestion, the drug can be absorbed faster and better, 4:00 p.m. is the best time to take cold medicine. If the drug is Chinese medicine, it is recommended to drink an hour before meals, because after meals, it is easy to react with food, thus affecting the efficacy of the drug, Chinese medicine and Western medicine can not be taken together, it is best to interval more than half an hour.