Yes: Or at least call the doctor's office with the new development. Your son could have an allergy to the zyrtec (cetirizine) or if could be from the initial seasonal allergies or it might be from any number of things. His doctor needs to make the call on how to proceed.
Answered 6/25/2014
5.1k views
Hives: I think it is a good idea to take him in for evaluation to see if it is hives and why it happens.
Answered 6/11/2013
5.1k views
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