| 常用名 | 盐酸倍他司汀 | CAS号 | 5579-84-0 |
|---|---|---|---|
| 价格 | 纯度 | 98.0% | |
| 备货期 | 10天 | 库存 | 现货 |
| 产品详情(用途,包装等)
用途: Betahistine Dihydrochloride is a histamine H3 receptors inhibitor used as an antivertigo drug.Target: Histamine ReceptorBetahistine, a structural analogue of histamine with weak histamine H(1) receptor agonist and more potent H(3) receptor antagonist properties. Betahistine acts centrally by enhancing histamine synthesis within tuberomammillary nuclei of the posterior hypothalamus and histamine release within vestibular nuclei through antagonism of H(3) autoreceptors [1].Therapeutic effects of betahistine in vestibular disorders result from its antagonist properties at histamine H(3) receptors (H(3)Rs). On inhibition of cAMP formation and [(3)H]arachidonic acid release, betahistine behaved as a nanomolar inverse agonist and a micromolar agonist. After acute oral administration, Betahistine increased t-MeHA levels with an ED(50) of 2 mg/kg, a rightward shift probably caused by almost complete first-pass metabolism. Therapeutic effects of betahistine result from an enhancement of histamine neuron activity induced by inverse agonism at H(3) autoreceptors [2]. 作用: 对脑血管、心血管,特别是对椎底动脉系统有较明显的扩张作用,显著增加心、脑及周围循环血流量,改善血循环,并降低全身血压,此外能增加耳蜗和前底血流量,从而消除内耳性眩晕,耳鸣和耳闭感,还能增加毛细血管通透性,促进细胞外液的吸收,消除淋巴内水肿;能对抗儿茶酚胺的缩血管作用及降低动脉压,并有抑制血浆凝固及 ADP诱导的血小板凝集作用,能延长大白鼠体外血栓形成时间,还有轻微的利尿作用。 物理化学性质: CAS号:5579-84-0 常用中文名:盐酸倍他司汀 常用英文名:Betahistine Dihydrochloride 分子式:C8H14Cl2N2 分子量:209.116 密度:0.967 g/cm3 沸点:210.9ºC at 760 mmHg 熔点:150-154 °C 闪点:96.7ºC 储存条件:室温 |