Zyrtec vs Zyrtec-D During Pregnancy

How do the options compare?

This comparison focuses on the added pseudoephedrine in Zyrtec-D, exact 12-hour formulation, pregnancy timing, medical cautions, and lactation implications rather than presenting both brand names as the same medicine.

• MotherToBaby summarizes more than 1,300 cetirizine-exposed pregnancies without a higher rate of birth differences and small studies without higher miscarriage, preterm birth, or low birth weight. These observational data are reassuring but do not establish zero risk. 1
• MotherToBaby reports that ACOG does not recommend pseudoephedrine during the first three months of pregnancy. Most studies have not found an overall malformation increase, but small associations with gastroschisis and a few other specific findings have been reported and remain uncertain. 2
• The Zyrtec-D 12 Hour label identifies each extended-release tablet as 5 milligrams cetirizine plus 120 milligrams pseudoephedrine, with one tablet every 12 hours and no more than two daily. It lists pregnancy consultation and cautions involving high blood pressure and several medical conditions. 3
• A prospective observational cohort compared 196 first-trimester cetirizine exposures with 1,686 comparison pregnancies. It did not find significant increases in major birth differences, miscarriage, or preterm birth, but confidence intervals were broad enough that the study cannot prove equivalence. 4
• LactMed reports that a single 60-milligram pseudoephedrine dose reduced milk production by an average of 24 percent over the next 24 hours in eight lactating participants. The small single-dose study does not establish the effect of every dose or feeding stage. 5

Which option makes sense?

The D means added pseudoephedrine, which creates the first-trimester, blood-pressure, duplication, and milk-supply differences.

Disclosure: Pregnancy Smart offers a supplement that overlaps with one or more options above. This page describes the pregnancy evidence for each option on its own merits.