Betahistine dihydrochloride (Betahistine 2HCl, PT-9, PT9)，又称盐酸倍他司汀或倍他司丁二盐酸盐，是一种可口服的组胺H1受体(histamine H1 receptor)激动剂和H3受体(H3 receptor)的拮抗剂，组胺类扩张血管药物，增加脑和内耳血流量，临床是用于治疗美尼尔氏综合征和缺血性脑血管疾病等。

参考文献

1.Poyurovsky M, et al. The effect of betahistine, a histamine H1 receptor agonist/H3 antagonist, on olanzapine-induced weight gain in first-episode schizophrenia patients. Int Clin Psychopharmacol. 2005 Mar;20(2):101-3.

2.Gbahou F, et al. Effects of betahistine at histamine H3 receptors: mixed inverse agonism/agonism in vitro and partial inverse agonism in vivo.J Pharmacol Exp Ther. 2010 Sep 1;334(3):945-54.

冰袋运输。粉末直接保存于-20℃，有效期3年。建议分装后-20℃干燥保存，避免反复冻融。