Cetirizine vs Montelukast

## Cetirizine vs Montelukast: Overview

This comparison examines the pharmacological differences between **Cetirizine** and **Montelukast**.

## Mechanism of Action

**Cetirizine**: Second-generation H1 antihistamine.

**Montelukast**: Selective leukotriene D4 receptor antagonist.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Montelukast — 2.7-5.5 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Montelukast — C35H36ClNO3S.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Montelukast — 586.1800 g/mol.

**Type**: Cetirizine — Small molecule; Montelukast — Small molecule.