Nexium, whose Chinese name is Esomeprazole Magnesium Enteric Tablets, is mainly used in clinical practice for gastroesophageal diseases such as esophageal mucosal erosion and Helicobacter pylori infection caused by gastroesophageal reflux disease. Esomeprazole Magnesium Enteric Tablets can inhibit the secretion of gastric acid in the stomach and reduce the erosion of gastric mucosa and esophagus by gastric acid, and can generally be used in combination with Mosapride to increase the gastrointestinal tract dynamics and promote the peristalsis of the digestive tract. There is no absolute contraindication to the use of this drug. The drug is widely bound to plasma proteins in the body and cannot be removed by dialysis after overdose. The drug should be used with caution during pregnancy and lactation, and is not recommended for children. The usual dose is one capsule per day for one person, which needs to be taken continuously for one month, just before breakfast.