According to Drugs.com, cetirizine hydrochloride is an anti-allergy medication. RxList shows cetirizine hydrochloride to be the generic formula name for Zyrtec in the United States.
Cetirizine hydrochloride is an anti-histamine medication sold over the counter in many pharmacies and drugstores. It comes in 5 milligram and 10 milligram dosages and is intended to treat those with allergies such as hayfever or dust and pet allergies. It has the inactive ingredients of magnesium stearate, titanium dioxide, lactose monohydrate, microcrystalline cellulose, colloidal silicon dioxide, croscarmellose sodium, hypromellose and polyethylene glycol. Someone who is allergic to cetirizine, hydroxyzine or levocetirizine should not take this medication, explains Drugs.com.