Allopurinol vs Osimertinib

## Allopurinol vs Osimertinib: Overview

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

## Mechanism of Action

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

**Osimertinib**: Third-generation irreversible EGFR TKI targeting T790M resistance mutation and activating mutations.

## Pharmacokinetics

**Half-life**: Allopurinol — 1-2 hours; Osimertinib — 48 hours.

## Chemical Properties

**Molecular Formula**: Allopurinol — C5H4N4O; Osimertinib — C28H33N7O2.

**Molecular Weight**: Allopurinol — 136.1120 g/mol; Osimertinib — 499.6050 g/mol.

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