Cetirizine is an over-the-counter (OTC) antihistamine. Pseudoephedrine is a decongestant. Zyrtec-D is an OTC combination medication of the two. Decongestants help relieve nasal congestion by ...

Zyrtec is a commonly used OTC antihistamine for managing allergy symptoms in adults and children. Several Zyrtec products, ...

Most OTC and prescription antihistamines begin to ... Alavert), desloratadine (Clarinex), cetirizine (Zyrtec), levocetirizine (Xyzal) and fexofenadine (Allegra), shouldn't make you feel sleepy.

A decongestant is a medication that helps ease nasal congestion, which happens when something irritates the lining of your nose. This can result from a cold, the flu, or allergies, for example.