Usually need to take bismuth aluminum acid granules can be effective for a week, due to the different physique of each person, the drug effect time is different, the specific situation varies from person to person. Bismuth Aluminate Granules is a compound preparation, the main ingredients are bismuth aluminate, magnesium bicarbonate, sodium bicarbonate, licorice extract powder, etc. It can protect the gastric mucous membrane, and is mainly applied to gastric ulcer, duodenal ulcer, chronic superficial gastritis, hyperacidity and other diseases. In general, most patients may experience some relief of symptoms after taking it continuously for about a week. As each person’s constitution is different, the drug takes effect in different time, and the specific situation varies from person to person. It is usually normal for patients to have black stools while taking the medicine. If the stool is dilute, the dosage can be reduced. A few patients may occasionally experience constipation, dry mouth, insomnia, nausea, diarrhea and other symptoms, which may disappear on their own after stopping the drug.