Fentanyl vs Memantine

## Fentanyl vs Memantine: Overview

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

## Mechanism of Action

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

**Memantine**: Non-competitive NMDA receptor antagonist.

## Pharmacokinetics

**Half-life**: Fentanyl — 2-4 hours; Memantine — 60-80 hours.

## Chemical Properties

**Molecular Formula**: Fentanyl — C22H28N2O; Memantine — C12H21N.

**Molecular Weight**: Fentanyl — 336.4700 g/mol; Memantine — 179.3080 g/mol.

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