Preventing or treating symptoms of hay fever and other upper respiratory allergies such as stuffy nose, runny nose, sneezing, itching of the nose and throat, and itchy, watery eyes. It is also used for preventing or treating chronic hives. It may also be used for other conditions as determined by your doctor. Zyrtec is an antihistamine. It works by blocking the action of histamine and reduces the symptoms of an allergic reaction.
Zyrtec, commonly referred to as Cetirizine is an antihistamine receptor that is used to reverse allergy symptoms such as a running nose, watery eyes, itching, hives, sneezing by blocking natural chemical called histamine which is manufactured by the body during an allergic reaction.
Zyrtec is not a treatment for serious allergy reactions thus it should not be used in substitute of any other prescribed medication.