A 35-year-old member asked:
how many days does it take for allegra (fexofenadine) to work?
2 doctor answers • 4 doctors weighed in
Dr. Andrew Murphy answered
Allergy and Immunology 29 years experience
Hours: Allegra (fexofenadine) and most oral antihistamines will start to work within an hour or so. It does not take days for these medications to work.
4789 viewsReviewed Jul 28, 2020
Dr. Heidi Fowler answered
Psychiatry 25 years experience
Allegra: Allegra can start working within a hour.
51 viewsReviewed Jul 28, 2020
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Last updated Jul 28, 2020
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