A 39-year-old member asked:
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how long does zyrtec (cetirizine) last?

2 doctor answers
Dr. Ryan Phasouk
17 years experience Family Medicine
Effects: The effects of zyrtec (cetirizine) should last up to 24 hours.
Answered on Apr 22, 2015
Dr. Diane Minich
36 years experience Family Medicine
Effects of Zyrtec (cetirizine): Lasts @ 24 hours.
Answered on Apr 29, 2016

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