Medically reviewed by Corinne Savides Happel, MD Key Takeaways Most antihistamines are not linked to birth defects and may be safe during pregnancy.Non-sedating antihistamines like Zyrtec and Claritin ...

Cetirizine is available as an over-the-counter (OTC) generic drug that comes in oral forms, including an oral tablet and solution. The usual dosage is 5 to 10 milligrams (mg) once per day, with a ...