Betahistine has the effect of dilating capillaries, diastolizing the anterior capillary sphincter, and increasing the blood flow in the microcirculation of the anterior capillaries, which has the effect of improving vestibular function and eliminating the symptoms of inner-ear vertigo, tinnitus, and occlusion of the ear. This drug is associated with adverse reactions such as dry mouth, nausea, stomach upset, dizziness, itchy skin, hemorrhagic cystitis, fever, allergic reactions, etc. If any of the above adverse reactions occur, please discontinue the drug immediately and seek medical advice promptly. This drug will interact with other antihistamines and monoamine oxidase inhibitors, and concomitant administration should be avoided. It is contraindicated for those who are allergic to this product or excipient components, patients with pheochromocytoma, children; peptic ulcer, bronchial asthma, chronic obstructive pulmonary disease, cardiovascular disease, liver disease, pregnancy and lactating women with caution. Need to apply this drug need to consult a professional doctor, the doctor according to the condition of the choice of medication, do not blindly use drugs.