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A member asked:
How many minutes after reaching maximum plasma concentration is the effect of an antihistamine most profound?
2 doctors weighed in across 2 answers
Varies: It is different for all the different antihistamines. For example, benadryl (diphenhydramine) reaches maximum effect within about 1 hour, but effect only lasts 2-9 hours. Zyrtec (cetirizine) reaches max effect within 1 hour as well, but the effect lasts >24 hours.
Answered 6/13/2017
660 views
Thank
Effective med: Depends on which medication but your local pharmacist can help
Answered 6/13/2017
660 views
Thank
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