Effect of cetirizine, levocetirizine, and dextrocetirizine on histamine‐induced nasal response in healthy adult volunteers

Abstract
Background: Cetirizine, an effective H1‐receptor antagonist, is a racemate mixture of two enantiomers: levocetirizine (R enantiomer) and dextrocetirizine (S enantiomer). Methods: To investigate the...