The generic name of Metzelin is L-Glutamine Crotonate Sodium Granules and the generic name of Rezidor is Bismuth Potassium Citrate, which do not have exactly the same effect. L-Glutamine Crotonate Sodium Granules is a kind of acid-making drug and anti-peptic ulcer drug, which is mainly used for gastritis, gastric ulcer and duodenal ulcer, and it can obviously relieve clinical symptoms and have a better effect of preventing ulcer recurrence. However, it is forbidden for those who are allergic to this product and its ingredients. Bismuth potassium citrate is a gastric mucous membrane protection over-the-counter drug, used for chronic gastritis and relief of stomach pain, heartburn sensation and acid reflux caused by excessive gastric acid, and also used to eradicate Helicobacter pylori. It is contraindicated in patients with severe kidney disease, those who are allergic to the product and its components and pregnant women. Both of the above drugs are gastric mucous membrane protectors, at which point they are more or less effective, and if each is used in other ways they can not be compared. The above drugs need to be used under medical supervision.