Metzelin is the trade name for L-Glutamine Crotalate Sodium, which is used for gastritis, gastric ulcers and duodenal ulcers, and you can drink water half an hour after taking the drug. L-Glutamine Croconate Sodium is a gastric protector that reduces symptoms and mucosal damage by forming a protective layer in the tissues of the stomach while neutralizing and counteracting the irritation of the stomach caused by gastric acid, and is mainly used to alleviate acute and chronic gastroenteritis, as well as peptic ulcers caused by certain factors such as Helicobacter pylori infection and drug-induced stress ulcers. If the drug is taken with water, the drug can be diluted by water, resulting in a decrease in the concentration of the drug in the gastric mucosa of the target organ, unable to reach the concentration of the drug, thus affecting the therapeutic effect of the drug, therefore, the drug is not recommended to be taken with water, half an hour after the use of the drug to drink water is better. In general, the drug does not produce serious side effects on the body, common side effects are nausea, constipation, diarrhea and so on, the symptoms are relatively mild, and the side effects can disappear after stopping the drug. It is recommended that patients, if necessary, please consult a doctor in a timely manner, the use of drugs need to be under the guidance of a doctor to apply rationally, do not blindly take medication, so as not to delay the condition.