Flunarizine how much to take every night needs to be standardized under the guidance of professional physicians. Flunarizine, whose full name is Flunarizine Hydrochloride, is mainly used for the treatment of cerebral blood supply insufficiency, vertebral basilar artery blood supply insufficiency, cavernous cerebral infarction, vertigo, migraine and epilepsy adjunctive medicine. Flunarizine hydrochloride preventive amount is one capsule, the therapeutic dose is two capsules, according to the metabolism ability of the drug is generally 5 to 6 weeks in the body to reach a stable state, that is, a full course of play stable to achieve the therapeutic effect, so the treatment of two capsules is preferred. The drug belongs to the calcium ion antagonist, the main role is to dilate blood vessels to improve the vertebral artery and the brain blood supply and oxygen supply to improve the symptoms. Flunarizine hydrochloride side effects include dizziness and headache, fatigue and drowsiness, nausea and dry mouth, muscle aches and pains, itchy skin, irritability and anxiety, etc.; elderly and infirm and drivers should be used with caution; children, pregnancy and childbirth, depression, allergy is prohibited; Flunarizine hydrochloride should not be used in combination with sedative hypnotic drugs such as diazepam. It is recommended that patients go to the neurology department of a regular hospital or consult a clinical pharmacist, and it is not recommended to use the drug on your own to avoid adverse consequences.