Cetirizine is used for:

• 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 to treat certain conditions as determined by your doctor that may not be listed in the professional package insert.
• Cetirizine is an antihistamine. It works by blocking the action of histamine and reduces the symptoms of an allergic reaction...