Source:http://linkedlifedata.com/resource/umls/id/C0700480
NCI: A synthetic phenylmethyl-piperazinyl derivative, antihistaminic Cetirizine is a metabolite of hydroxyzine and a selective peripheral histamine H1-receptor antagonist. It is used for symptomatic treatment of seasonal and perennial allergic rhinitis and for chronic urticaria. (NCI04)