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A member asked:
How long does it take for zyrtec (cetirizine) to be out of your system?
A doctor has provided 1 answer
Effects of Zyrtec (cetirizine): The half-life of Cetirizine (the time it takes for your body to get rid of half of the drug) is about 8 hours. The vast majority should be gone within about 24 hours.
Answered 4/3/2019
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