Allopurinol vs Rabeprazole

## Allopurinol vs Rabeprazole: Overview

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

## Mechanism of Action

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

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

## Pharmacokinetics

**Half-life**: Allopurinol — 1-2 hours; Rabeprazole — 1-2 hours.

## Chemical Properties

**Molecular Formula**: Allopurinol — C5H4N4O; Rabeprazole — C18H21N3O3S.

**Molecular Weight**: Allopurinol — 136.1120 g/mol; Rabeprazole — 359.4440 g/mol.

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