Cetirizine vs Pembrolizumab

## Cetirizine vs Pembrolizumab: Overview

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

## Mechanism of Action

**Cetirizine**: Second-generation H1 antihistamine.

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

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Pembrolizumab — 26 days.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Pembrolizumab — N/A.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Pembrolizumab — N/A.

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