Fentanyl vs Tacrolimus

## Fentanyl vs Tacrolimus: Overview

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

## Mechanism of Action

**Fentanyl**: Highly potent synthetic mu-opioid receptor agonist approximately 100 times more potent than morphine.

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

## Pharmacokinetics

**Half-life**: Fentanyl — 2-4 hours; Tacrolimus — 12 hours.

## Chemical Properties

**Molecular Formula**: Fentanyl — C22H28N2O; Tacrolimus — C44H69NO12.

**Molecular Weight**: Fentanyl — 336.4700 g/mol; Tacrolimus — 804.0180 g/mol.

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