A first generation: It is first generation antihistamine. It can cause significant drowsiness , and antichiolinergic effects (can cause problems with an enlarged prostate). It was the favorite antihistamine by many specialists for itching and swelling. A break down product of Hydroxyzine is Cetirizine (brand name zyrtec) is now frequently used less side effects.
Answered 7/13/2017
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Old antihistamine: Hydroxyzine is a first generation antihistamine that is marketed as vistaril (hydroxyzine) and atarax. It is used for itchy rashes, sedative effects and sometimes during anesthesia.
Answered 10/24/2017
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