The dosage of belladonna tablets is oral. 10-30mg once, 30-90mg a day; the maximum dose is 50mg once, 0.15g a day. The drug is a proprietary Chinese medicine composed of belladonna extract, which can relieve the spasm of gastrointestinal smooth muscle and inhibit glandular secretion. It is clinically used in the treatment of gastric ulcer, duodenal ulcer, gastrointestinal pain, renal colic and biliary colic. There are adverse reactions such as dry mouth, skin flushing and constipation after using the drug; dizziness and blurred vision may occur when the drug is used in large doses. Glaucoma, prostate hyperplasia, tachycardia patients are prohibited; lactating women are prohibited. Use with caution in pregnant women and patients with hypertension, heart disease, reflux esophagitis, gastrointestinal obstructive disorders, hyperthyroidism, ulcerative colitis. If you need to use the drug, should be used under the guidance of a physician, not self-medication, in order to avoid adverse reactions.