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A member asked:
How long does the effects of hydroxyzine 25mg last before next dosage is due?
2 doctors weighed in across 2 answers
About a half day: By average, it will take at least a half day before all its effects wear off.
Answered 4/22/2019
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72 hrs: A single dose of Hydroxyzine can suppress the allergy skin test reaction for about 72 hours (some may claim a whole week) although the peak suppressive effect would be within the first day or so.
Answered 1/13/2020
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