what is cetirizine hydrochloride derived from
(Redirected from Ceterizine). Cetirizine /sÉËtÉªrÉ¨ziËn/ (trade names Zirtec, Zyrtec, Reactine) is a second-generation antihistamine used in the treatment of hay fever, allergies, angioedema, and urticaria. It is a major metabolite of hydroxyzine, and a racemic selective H1 receptor antagonist.etirizine is an effective agent in treating the symptoms of Kimura's disease, which mostly occurs in young Asian men, affecting the lymph nodes and soft tissue of the head and neck in the form of tumor-like lesions.