Fentanyl vs Venlafaxine

## Fentanyl vs Venlafaxine: Overview

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

## Mechanism of Action

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

**Venlafaxine**: Serotonin-norepinephrine reuptake inhibitor (SNRI).

## Pharmacokinetics

**Half-life**: Fentanyl — 2-4 hours; Venlafaxine — 5 hours.

## Chemical Properties

**Molecular Formula**: Fentanyl — C22H28N2O; Venlafaxine — C17H27NO2.

**Molecular Weight**: Fentanyl — 336.4700 g/mol; Venlafaxine — 277.4020 g/mol.

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