It is mainly used for the treatment of gastric ulcers and chronic gastritis, or to relieve stomach pain, heartburn and acid reflux caused by excessive acidity, because it can form a protective film on the surface of ulcers and inflammation to isolate stomach acid. This drug may be taken four times a day, the first three times an hour before three meals, and the last time at bedtime. It is important to note that milk can reduce the efficacy of colloidal bismuth, so do not take it together with milk. If there is no other discomfort, it is a normal reaction, and the color of stool can return to normal after 1-2 days of stopping the medication. This medicine is not recommended for long-term use in large quantities. If the condition is not relieved after seven consecutive days of medication, it is necessary to seek medical attention.