Sibirin refers to Flunarizine Hydrochloride Capsules, which is different from Betahistine in terms of therapeutic effects, adverse effects, and contraindications. 1. Therapeutic effect: Flunarizine hydrochloride capsules are generally used for the prophylactic treatment of migraine, as well as symptomatic treatment of vertigo caused by vestibular dysfunction. Betahistine treats peripheral vertigo, or dizziness and vertigo sensation caused by central lesions, such as Meniere’s disease and insufficient blood supply of vertebral basilar artery. 2. Adverse reactions: Flunarizine Hydrochloride Capsules can cause burning sensation in the stomach, hyperpepsia, increased eating, weight gain and other digestive discomforts can also cause anxiety, depression and other adverse reactions of the central nervous system. Betahistine can cause facial flushing, rotational vertigo, fluctuating hearing loss, tinnitus, ear stuffiness feeling. 3. Contraindications: Flunarizine Hydrochloride Capsules can not be used in pregnant women, the elderly, patients with depression and other groups of people, drivers, aerial work and other groups of people are not recommended; and Betahistine can not be used in patients with acute exacerbation of bronchial asthma, patients with acute ulcers of the peptic tract, children, allergic to the components of the drug and other groups of people. The selection and use of Flunarizine Hydrochloride Capsules and Betahistine must be done under the guidance of a doctor to avoid blind self-medication.