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 ...

Fortunately, many newer, second-generation antihistamines last longer and are non- or low-sedating, says Dr. Bassett. These include Zyrtec, Xyzal, Allegra, and Claritin (or their generic formulation).

Use Zyrtec Liquid Gels (Oral ... Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.