Betahistine dihydrochloride

Solid
Solid
Betahistine is an aminoalkylpyridine that is pyridine substituted by a 2-(methylamino)ethyl group at position 2. It acts as a histamine agonist and a vasodilator, and is thought to improve the microcirculation of the labyrinth, resulting in reduced endolymphatic pressure. It is used (generally as the hydrochloride or mesylate salt) to reduce the symptoms of vertigo, tinnitus, and hearing loss associated with Meniere's disease. It has a role as a vasodilator agent and a H1-receptor agonist. It is an aminoalkylpyridine and a secondary amino compound.|Ménière's disease is a progressive disease of the inner ear characterized by vertigo, tinnitus, and hearing loss. It has a significant impact on both the physical and social functioning of affected individuals. Betahistine is a histamine-like antivertigo drug used for treating symptoms associated with Ménière's disease. It is thought to reduce symptoms through its actions on histamine receptors. Betahistine was first approved by the FDA in the 1970s but withdrawn within approximately 5 years due to a lack of evidence supporting its efficacy. It is currently marketed in Canada by various companies, including Teva Pharmaceuticals.|Betahistine is a histamine analog with weak histamine H1 agonistic and more potent histamine H3 antagonistic properties. Upon intranasal administration, betahistine binds to histamine H1 and H3 receptors and exerts its agonistic and antagonistic actions locally and centrally. This promotes cochlear, vestibular and cerebral blood flow, decreases neuronal firing in the vestibular nuclei and increases histamine synthesis and release in the brain which facilitates vestibular compensation. Increased blood flow around the inner ear reduces the amount of fluid in the inner ear and may alleviate vertigo, tinnitus, and hearing loss.|A histamine analog and H1 receptor agonist that serves as a vasodilator. It is used in MENIERE DISEASE and in vascular headaches but may exacerbate bronchial asthma and peptic ulcers.