Acetaminophen vs Fentanyl

## Acetaminophen vs Fentanyl: Overview

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

## Mechanism of Action

**Acetaminophen**: Inhibits prostaglandin synthesis in the CNS and peripherally blocks pain impulse generation.

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

## Pharmacokinetics

**Half-life**: Acetaminophen — 1-4 hours; Fentanyl — 2-4 hours.

## Chemical Properties

**Molecular Formula**: Acetaminophen — C8H9NO2; Fentanyl — C22H28N2O.

**Molecular Weight**: Acetaminophen — 151.1630 g/mol; Fentanyl — 336.4700 g/mol.

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