Allopurinol vs Captopril

## Allopurinol vs Captopril: Overview

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

## Mechanism of Action

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

**Captopril**: First orally active ACE inhibitor; contains thiol group that binds zinc at ACE active site.

## Pharmacokinetics

**Half-life**: Allopurinol — 1-2 hours; Captopril — 1.9 hours.

## Chemical Properties

**Molecular Formula**: Allopurinol — C5H4N4O; Captopril — C9H15NO3S.

**Molecular Weight**: Allopurinol — 136.1120 g/mol; Captopril — 217.2850 g/mol.

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