Doctors prescribe ceterizine for the treatment of allergy and hay fever symptoms, including itching and hives, according to Drugs.com. It is a histamine-1 receptor antagonist used as an antihistamine.
Ceterizine controls symptoms of colds and allergies, including sneezing, watery eyes, runny nose and itching, by reducing levels of histamine, a chemical in the body that causes symptoms, notes Drugs.com. Manufacturers market cetirizine under the brand name Zyrtec, and it is available for purchase in both prescription and over-the-counter strengths in tablets, chewable tablets and liquid formulas. Some side effects associated with the drug include dry mouth, dizziness, tiredness and headache.