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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
Dr. David Martin answered

Specializes in ENT - Head & Neck Surgery

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

4.9k views

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I had 30 mg of Zyrtec on Monday, 40 mg of Claritin (loratadine) on Tuesday, and 30 mg of Claritin (loratadine) on Wednesday. When will it all be out of my system?

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