Yes and no: It's important to consult with your ob, but zyrtec (cetirizine) is a category b antihistamine that most allergists would agree is safe during pregnancy and breast feeding. However, pseudoephedrine, sudafed (decongestant) has been linked to a birth defect called gastroschisis (problem with the abdominal wall not completely closing). In the first trimester, the risk/benefit ratio should be weighed carefully.
Answered 12/9/2013
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