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(R)-Cetirizine-d4 Dihydrochloride is an isotope labeled form of (R)-Cetirizine (C281100). A nonsedating type histamine H1-receptor antagonist. A major metabolite of Hydroxyzine. Pharmacological activity resides primarily in the (R)-isomer. Antihystaminic.

Labelled (R)-Cetirizine (C281100). A nonsedating type histamine H1-receptor antagonist. A major metabolite of Hydroxyzine. Pharmacological activity resides primarily in the (R)-isomer. Antihystaminic.

ChEBI: Cetirizine is a member of the class of piperazines that is piperazine in which the hydrogens attached to nitrogen are replaced by a (4-chlorophenyl)(phenyl)methyl and a 2-(carboxymethoxy)ethyl group respectively. It has a role as an anti-allergic agent, a H1-receptor antagonist, an environmental contaminant and a xenobiotic. It is a monocarboxylic acid, a member of piperazines, a member of monochlorobenzenes and an ether.