Xyzal (levocetirizine) and Zyrtec (cetirizine) are antihistamines used to relieve allergy symptoms such as sneezing, runny nose, itchy eyes, and hives. Although Xyzal and Zyrtec work similarly, some ...

When that allergy season hits, it's normal to reach for your medication to try and get through your day. An FDA estimate says that 62.7 million over-the-counter packages of Zyrtec (cetirizine) and ...