A 41-year-old member asked:
For what length of time will antihistamines remain active in the body?
2 doctor answers • 5 doctors weighed in
Allergy and Immunology 28 years experience
Depends: It depends on a few factors including the rate at which the antihistamine is metabolized by a particular person, other concommitant medications which can affect the rate at which it is metabolized, age of the person, and whether an antihistamine is long acting( like zyrtec) or short acting(like benadryl).
6.3k viewsReviewed >2 years ago
Allergy and Immunology 17 years experience
5.4k viewsReviewed >2 years ago
Last updated May 5, 2015
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