Allopurinol vs Levothyroxine

## Allopurinol vs Levothyroxine: Overview

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

## Mechanism of Action

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

**Levothyroxine**: Synthetic thyroid hormone T4 replacement.

## Pharmacokinetics

**Half-life**: Allopurinol — 1-2 hours; Levothyroxine — 6-7 days.

## Chemical Properties

**Molecular Formula**: Allopurinol — C5H4N4O; Levothyroxine — C15H11I4NO4.

**Molecular Weight**: Allopurinol — 136.1120 g/mol; Levothyroxine — 776.8700 g/mol.

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