Ondansetron vs Ranitidine

## Ondansetron vs Ranitidine: Overview

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

## Mechanism of Action

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

**Ranitidine**: Competitive H2 receptor antagonist.

## Pharmacokinetics

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

## Chemical Properties

**Molecular Formula**: Ondansetron — C18H19N3O; Ranitidine — C13H22N4O3S.

**Molecular Weight**: Ondansetron — 293.3660 g/mol; Ranitidine — 314.4050 g/mol.

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