Allopurinol vs Cetirizine

## Allopurinol vs Cetirizine: Overview

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

## Mechanism of Action

**Allopurinol**: Xanthine oxidase inhibitor reducing uric acid production.

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

## Pharmacokinetics

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

## Chemical Properties

**Molecular Formula**: Allopurinol — C5H4N4O; Cetirizine — C21H25ClN2O3.

**Molecular Weight**: Allopurinol — 136.1120 g/mol; Cetirizine — 388.8900 g/mol.

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