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A member asked:
How long does zyrtec (cetirizine) last?
4 doctors weighed in across 2 answers
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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