Cetirizine hydrochloride

seh-TIH-rah-zeen Pregnancy Category B Reactine M, Zyrtec Rx Classification Antihistamine See also Antihistamines. Action Kinetics A potent H1-re-ceptor antagonist. A mild bronchod-ilator that protects against histmine-in-duced bronchospasm negligible anticholinergic and sedative activity. Rapidly absorbed after PO administration however, food delays the time to peak serum levels but does not decrease the total amount of drug absorbed. Poorly penetrates the CNS, but high levels are distributed...