Ondansetron vs Rituximab

## Ondansetron vs Rituximab: Overview

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

## Mechanism of Action

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

**Rituximab**: Chimeric anti-CD20 IgG1 monoclonal antibody inducing B-cell depletion via CDC, ADCC, and apoptosis.

## Pharmacokinetics

**Half-life**: Ondansetron — 3-5 hours; Rituximab — 22 days.

## Chemical Properties

**Molecular Formula**: Ondansetron — C18H19N3O; Rituximab — N/A.

**Molecular Weight**: Ondansetron — 293.3660 g/mol; Rituximab — N/A.

**Type**: Ondansetron — Small molecule; Rituximab — Antibody.