Ondansetron vs Paroxetine

## Ondansetron vs Paroxetine: Overview

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

## Mechanism of Action

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

**Paroxetine**: Potent selective serotonin reuptake inhibitor with additional muscarinic and NE reuptake inhibition.

## Pharmacokinetics

**Half-life**: Ondansetron — 3-5 hours; Paroxetine — 21 hours.

## Chemical Properties

**Molecular Formula**: Ondansetron — C18H19N3O; Paroxetine — C19H20FNO3.

**Molecular Weight**: Ondansetron — 293.3660 g/mol; Paroxetine — 329.3730 g/mol.

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