Fentanyl vs Ondansetron

## Fentanyl vs Ondansetron: Overview

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

## Mechanism of Action

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

**Ondansetron**: Selective 5-HT3 receptor antagonist.

## Pharmacokinetics

**Half-life**: Fentanyl — 2-4 hours; Ondansetron — 3-5 hours.

## Chemical Properties

**Molecular Formula**: Fentanyl — C22H28N2O; Ondansetron — C18H19N3O.

**Molecular Weight**: Fentanyl — 336.4700 g/mol; Ondansetron — 293.3660 g/mol.

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