Cetirizine vs Rabeprazole

## Cetirizine vs Rabeprazole: Overview

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

## Mechanism of Action

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

**Rabeprazole**: Proton pump inhibitor irreversibly inhibiting gastric H+/K+-ATPase with faster onset than omeprazole.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Rabeprazole — 1-2 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Rabeprazole — C18H21N3O3S.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Rabeprazole — 359.4440 g/mol.

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