Cetirizine vs Trastuzumab

## Cetirizine vs Trastuzumab: Overview

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

## Mechanism of Action

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

**Trastuzumab**: Anti-HER2 monoclonal antibody inhibiting receptor signaling.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Trastuzumab — 28 days.

## Chemical Properties

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

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

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