The efficacy of Betahistine Hydrochloride Injection is for the treatment of postural tinnitus and vertigo caused by cerebral arteriosclerosis, inner ear vertigo, etc.; the side effects include dry mouth, loss of appetite, palpitations and so on. Betahistine Hydrochloride Injection belongs to H1 receptor agonist, which has the effects of dilating blood vessels, improving blood circulation and lowering blood pressure; it is commonly used in the treatment of cerebral arteriosclerosis, inner ear vertigo, defective cardiovascular and cerebral vascular diseases as well as postural tinnitus and vertigo caused by high blood pressure. Side effects of the drug include dry mouth, loss of appetite, stomach upset, palpitations, skin itching, aggravation of peptic ulcers, etc.; dizziness, head swelling, sweating, etc. in individual cases; hemorrhagic cystitis and fever are occasionally seen. It should be noted that people who are allergic to this product, children should be prohibited. It should be used with caution in patients with peptic ulcer, pheochromocytoma and bronchial asthma, as well as pregnant women. If you need to use betahistine hydrochloride injection, it is recommended to go to a regular hospital to consult a doctor and use the medicine under the doctor’s guidance to avoid unauthorized use.