Xyzal (levocetirizine) and Zyrtec (cetirizine) are over-the-counter (OTC) allergy medications. Learn about their key ...
Zyrtec (cetirizine) and Zyrtec-D (cetirizine and pseudoephedrine) have similar names and uses. However, the key difference between the medications is that, in addition to cetirizine, Zyrtec-D ...
Schuval, M.D., the chief of the ... and it causes drowsiness, dryness [of the mouth and nose], and constipation,” Dr.
Claritin-D, Allegra-D, and Zyrtec-D all contain a decongestant called ... Allegra is the least likely to make you drowsy. Claritin is long-acting, with effects that last for 24 hours.