Betahistine Methylsulfonate (sulfur is a misspelling) Tablet is a histamine derivative that can agonize histamine H1 receptors and has vasodilatory effects. By dilating blood vessels in the brain and inner ear, Betahistine Mesylate can promote blood circulation in the brainstem and labyrinth, correct vasospasm in the inner ear, and reduce the membrane labyrinth effusion. Clinically, Betahistine Mesylate is mainly used for the treatment of Meniere’s disease, Meniere’s syndrome, vertigo accompanied by vertigo and dizziness, and also for the treatment of acute and chronic ischemic cerebrovascular diseases, such as cerebral infarction, cerebral atherosclerosis, transient ischemic attack, and so on. The main adverse reactions of betahistine mesylate are nausea, vomiting and other digestive symptoms, and some patients may cause allergic reactions, rash, itching and so on. It is contraindicated for those who are allergic to the components of the drug. Peptic ulcer patients, betahistine mesylate can cause increased secretion of gastric acid, resulting in ulcer aggravation; bronchial asthma patients, betahistine mesylate can cause bronchial constriction, inducing asthma, be careful with the drug. Betahistine mesylate must be used under the guidance of a specialist, the occurrence of adverse reactions to the hospital in time to avoid delaying the condition.