The difference between taking medication before and after meals is that it affects the absorption of medication in the gastrointestinal tract and the irritation of medication on the gastrointestinal mucosa. Generally speaking, the use of drugs before and after meals is based on the nature of the drug, the role of the drug, taking time to decide. If you take the drug before meals, the absorption of the drug is better, and the stimulation of the gastrointestinal tract may be greater. If you take the drug after meals, the stimulation of the stomach and intestines is relatively small, the role of slower, food may also affect the effectiveness of the drug. 1. Drugs taken before meals: gastric drugs, especially those that protect the gastric mucosa, should also be taken before meals. Sugar-lowering drugs should be taken before meals, which can lower blood sugar. 2. Drugs taken after meals: some antibiotics such as amoxicillin, roxithromycin, norfloxacin and other drugs can be taken on an empty stomach is more conducive to absorption. Fat-soluble vitamins need to be taken after meals to be easily absorbed. Hormones such as dexamethasone, prednisolone and methylprednisolone need to be taken after meals. Specific medication needs to be used under the guidance of a medical professional, or according to instructions or medical advice. During the use of drugs also need to prohibit spicy stimulation fried diet, eat more fruits and vegetables and crude fiber, to maintain a smooth bowel movement.