Aspirin vs Fentanyl

## Aspirin vs Fentanyl: Overview

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

## Mechanism of Action

**Aspirin**: Irreversibly inhibits cyclooxygenase-1 and -2.

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

## Pharmacokinetics

**Half-life**: Aspirin — 2-3 hours; Fentanyl — 2-4 hours.

## Chemical Properties

**Molecular Formula**: Aspirin — C9H8O4; Fentanyl — C22H28N2O.

**Molecular Weight**: Aspirin — 180.1580 g/mol; Fentanyl — 336.4700 g/mol.

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