Cetirizine is an antihistamine that reduces the natural chemical histamine in the body. Histamine
can produce symptoms of sneezing, itching, watery eyes, and runny nose.
Pseudoephedrine is a decongestant that shrinks blood vessels in the nasal passages. Dilated
blood vessels can cause nasal congestion (stuffy nose).
The combination of cetirizine and pseudoephedrine is used to treat cold or allergy symptoms
such as nasal and sinus congestion, sneezing, itching, watery eyes, or runny nose.
Cetirizine and pseudoephedrine may also be used for other purposes not listed in this
medication guide.