Zyrtec is used to relieve the pain of acute rhinitis, a seasonal inflammation of the nose. It is also used to treat allergic pain associated with the nose, such as dust allergy and nasal allergies.
Zyrtec is also used to treat chronic itching resulting from skin rashes. The medicine contains cetirizine, which belongs to a group of non-sedating antihistamines. This substance works to prevent the production of histamine, which is secreted by the human body as part of its defense system, as this substance is stored in the body's somatic cells.