Cetirizine vs Irbesartan

## Cetirizine vs Irbesartan: Overview

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

## Mechanism of Action

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

**Irbesartan**: Selective non-competitive angiotensin II type 1 receptor antagonist.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Irbesartan — 11-15 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Irbesartan — C25H28N6O.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Irbesartan — 428.5320 g/mol.

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