A member asked:

How long does zyrtec (cetirizine) last?

4 doctors weighed in across 2 answers
Dr. Ryan Phasouk answered

Specializes in Family Medicine

Effects: The effects of zyrtec (cetirizine) should last up to 24 hours.

Answered 4/22/2015

4.3k views

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Effects of Zyrtec (cetirizine): Lasts @ 24 hours.

Answered 4/29/2016

4.3k views

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