Allopurinol vs Phenytoin

## Allopurinol vs Phenytoin: Overview

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

## Mechanism of Action

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

**Phenytoin**: Sodium channel blocker stabilizing inactive state.

## Pharmacokinetics

**Half-life**: Allopurinol — 1-2 hours; Phenytoin — 22 hours.

## Chemical Properties

**Molecular Formula**: Allopurinol — C5H4N4O; Phenytoin — C15H12N2O2.

**Molecular Weight**: Allopurinol — 136.1120 g/mol; Phenytoin — 252.2680 g/mol.

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