Ondansetron vs Pembrolizumab

## Ondansetron vs Pembrolizumab: Overview

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

## Mechanism of Action

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

**Pembrolizumab**: Anti-PD-1 monoclonal antibody restoring anti-tumor immunity.

## Pharmacokinetics

**Half-life**: Ondansetron — 3-5 hours; Pembrolizumab — 26 days.

## Chemical Properties

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

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

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