Ciclestine is the trade name of the drug called betahistine hydrochloride oral solution, which is mainly used for ischemic cerebrovascular disease, auricular vertigo, vertigo, tinnitus, hearing loss caused by cerebral arteriosclerosis. Betahistine is a diamine oxidase inhibitor, cerebrovascular cardiovascular, especially for the vertebral basilar artery system has a significant dilation of the role of the heart and brain and peripheral circulation can increase the volume of blood, improve blood circulation. Clinically the drug is mainly used for Meniere’s disease, vascular headache and cerebral arteriosclerosis, and can be used for the treatment of acute ischemic cerebrovascular disease, such as cerebral thrombosis, cerebral embolism, transient cerebral blood supply insufficiency, etc.; high blood pressure caused by upright vertigo, tinnitus and so on are also effective. Common adverse reactions to the administration of this product include dry mouth, palpitations (rapid heartbeat, often accompanied by panic), stomach upset, nausea, dizziness, head swelling, sweating and other symptoms. Contraindications are unclear. Precautions for use of the drug mainly include peptic ulcer, asthma, pregnant women should be used with caution; children are prohibited. It is recommended that patients should be under the guidance of a doctor or refer to the instructions for application.