Flunarizine hydrochloride may cause weight gain, but the incidence is relatively low. Flunarizine hydrochloride may cause the adverse effect of weight gain, but the incidence is very low, and the main side effects of the drug are stomach upset, fatigue, and drowsiness. It is contraindicated in patients with a history of depression, Parkinson’s disease or other symptoms of extrapyramidal disorders. Flunarizine hydrochloride can improve cerebral circulation and neural metabolism and relieve vertigo caused by vestibular dysfunction. It can be used for cerebral blood supply insufficiency, vertebral artery ischemia, after cerebral thrombosis, etc.; it can also be used for tinnitus, cerebral dizziness, migraine prophylaxis, etc., and it can be used for epilepsy adjuvant therapy. It is recommended that patients go to the hospital for further counseling and use the drug as prescribed by the doctor.