Effects last 4-6 hrs: Maximum effect of Atarax (hydroxyzine) takes place at 30-60 minutes. Its effects last about 4-6 hours. It's completely eliminated from your system after about 40 hours.
Answered 11/7/2020
6.4k views
Hydroxyzine: Hydroxyzine (atarax) has a typical half-life of 20-25 hours.
Answered 4/1/2019
5.2k views
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