Rezidor refers to bismuth potassium citrate granules and bismuth pectin refers to colloidal bismuth pectin capsules. The difference between bismuth potassium citrate granules and colloidal bismuth pectin capsules mainly includes indications, contraindications, adverse reactions and so on. 1. Indications: Bismuth potassium citrate granules are suitable for the treatment of chronic gastritis and relief of stomach pain, acid reflux, heartburn sensation (heartburn) caused by excessive stomach acid. Bismuth Colloidal Pectin Capsules are suitable for the treatment of gastric and duodenal ulcer, chronic atrophic gastritis, Helicobacter pylori-associated chronic superficial gastritis. 2. Contraindication: bismuth citrate potassium granules are prohibited in patients with severe renal disease and pregnant women; colloidal bismuth pectin capsules are prohibited in patients with severe renal insufficiency. 3. Adverse reactions: during the period of taking bismuth citrate particles, there may be ammonia taste in the mouth, grayish-black stool tongue, occasional constipation, nausea and other symptoms, can be restored after stopping the drug; taking colloidal bismuth pectin capsule feces can be a lusterless blackish-brown, can be restored after stopping the drug symptoms. Taking bismuth citrate potassium granules, colloidal bismuth pectin capsules need to be guided by a doctor to take medication, not self medication.