Hydroxyzine (dihydrochloride) (Standard) is the analytical standard of Hydroxyzine (dihydrochloride). This product is intended for research and analytical applications. Hydroxyzine dihydrochloride, a benzodiazepine antihistamine agent, acts as a orally active histamine H1-receptor and serotonin antagonist. Hydroxyzine dihydrochloride has anxiolytic effect and can be used forthe research of generalised anxiety disorder^[1][2].