The dosage of bismuth pectin is 100~200mg/dose, 3~4 times/day, and the usage is taken orally before meal or at bedtime, and the specific dosage should follow the doctor’s instruction. Bismuth pectin is a bismuth gastric mucous membrane protector, suitable for the treatment of peptic ulcer and chronic gastritis. The dosage of this drug is 100~200mg per time (in bismuth), 3~4 times a day, the use of one hour before meals and bedtime oral, to four weeks for a course of treatment. Among them, especially 150mg/time, 4 times/day is the most commonly used dose. In addition, it should be noted that bismuth pectin is contraindicated in people who are allergic to it or have renal insufficiency, and nausea, constipation and other adverse reactions may occur during the use of the drug. Therefore, those who have the need to use this drug must be under the guidance of a doctor to determine the dosage according to the actual situation of the individual, and closely observe the efficacy of the drug and the reaction. Do not take the drug blindly or increase or decrease the dosage on your own to avoid adverse effects.