A 42-year-old member asked:
How long does it take for vistaril (hydroxyzine) to start to work?
1 doctor answer
Dr. Jeffrey Rosch answered
48 years experience in Allergy and Immunology
Vistaril (hydroxyzine) action : Vistaril (hydroxyzine) is an antihistamine that is available in a liquid, tablet, and im forms. The onset of action of the injectable for is minutes, while the oral routes start in 30 minutes to 2 hours.
Answered on Aug 1, 2019
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