Glutamine capsules have the role of repairing the gastrointestinal mucosa, but in the use of the need to pay attention to monitoring adverse reactions, contraindications prohibit the use of drugs. Glutamine has the role of repairing gastrointestinal mucosal damage, can to a certain extent promote the production of gastric mucosal defense factors, but also for the formation of gastrointestinal ulcers at the granulation of the gastrointestinal tract also has a certain role in promoting. The drug can be used for gastric ulcer, duodenal ulcer and other gastrointestinal mucosal injury disease adjuvant therapy, at the same time can reduce aspirin and other drugs mucosal damage. However, it should be noted that in case of nausea and vomiting, changes in bowel movements such as constipation or diarrhea, flushing and other changes in use, it is recommended to stop using the drug and consult a doctor. It is contraindicated for those who are allergic to glutamine. The drug needs to be used with caution during pregnancy, lactation, advanced age, and severe renal impairment. Glutamine drugs need to be used under the guidance of clinicians, and unauthorized use is prohibited.