A member asked:

Could my low thyroid problem be caused by taking cetirizine hcl 10 mg every night?

3 doctors weighed in across 2 answers

Not necessarily: Cetirizine (zyrtec) is not associated with causing low thyriod. It may cause some symptoms that are also be associated with low thyriod like fatigue, weight gain. Please see your doctor for low thyroid evaluation/ care and also to determine the cause/ need of Cetirizine nightly.

Answered 6/24/2014

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Dr. Quang Nguyen answered

Specializes in Endocrinology

No: There should be no connection.

Answered 10/10/2012

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