Atarax? 25 mg contains hydroxyzine dihydrochloride, an antihistamine with tranquilizing and anxiolytic properties. It is used in the treatment of anxiety, allergic conditions, pruritus (itching), and as a sedative prior to medical or surgical procedures. Hydroxyzine works by blocking H1 histamine receptors and exerting a calming effect on the central nervous system. Its dual antihistamine and sedative action makes it effective for relieving allergic symptoms while also reducing anxiety and tension.