Cetirizine D4 dihydrochloride is a deuterium-labeled Cetirizine. Cetirizine is a second-generation antihistamine and a long-acting histamine H1-receptor antagonist.
Cetirizine D8 dihydrochloride is a deuterium-labeled Cetirizine. Cetirizine is a second-generation antihistamine and a long-acting histamine H1-receptor antagonist.