Chronic gastritis medication is before meals, some are after meals, different kinds of drugs oral time is not the same, as follows: 1, proton pump inhibitors: omeprazole enteric-coated tablets as the main drug, this drug is usually required to be half an hour before meals orally. 2, regulating the gastrointestinal tract power of the drug: for example, Mosapride dispersible tablets, this drug is usually required to be taken before meals or meals. 3, to protect the gastric mucosa of the The drug: magnesium aluminum carbonate tablets mainly, this drug is usually required to take meals or after meals, can achieve better efficacy.