Allopurinol vs Tacrolimus

## Allopurinol vs Tacrolimus: Overview

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

## Mechanism of Action

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

**Tacrolimus**: Calcineurin inhibitor binding FKBP12; suppresses IL-2 transcription.

## Pharmacokinetics

**Half-life**: Allopurinol — 1-2 hours; Tacrolimus — 12 hours.

## Chemical Properties

**Molecular Formula**: Allopurinol — C5H4N4O; Tacrolimus — C44H69NO12.

**Molecular Weight**: Allopurinol — 136.1120 g/mol; Tacrolimus — 804.0180 g/mol.

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