(R)-(+)-Mequitazine

(R)-(+)-Mequitazine is a histamine H1 receptor antagonist that mainly undergoes bio-transformation via human liver microsomes, resulting in hydroxylated and S-oxidized metabolites. (R)-(+)-Mequitazine competitively binds to the H1 receptors in gastrointestinal, vascular, and respiratory effect cells, thus blocking the endogenous activity of histamine. (R)-(+)-Mequitazine has an inhibitory effect on CYP3A-catalyzed midazolam 1’-hydroxylase. (R)-(+)-Mequitazine can be used in the study of various allergic disorders.