is xyzal the same as zyrtec?
The difference between Xyzal and Zyrtec Xyzal (levocetirizine) and Zyrtec (cetirizine) are both antihistamines. Xyzal is produced by Sanofi, and Zyrtec is produced by a division of Johnson & Johnson. They're both marketed as providing relief from the symptoms of allergies.