How Does Zyrtec Work?
This reaction is partly caused by the release of histamine from certain cells in the body. Zyrtec is an antihistamine, which means it blocks histamine from binding to histamine receptors and causing allergy symptoms. Since histamine is responsible for many of the symptoms of allergies, blocking it can be helpful. It is important to note that antihistamines do not help treat nasal congestion caused by allergies, since this symptom is not due to histamine.
