Cetirizine vs Vancomycin

## Cetirizine vs Vancomycin: Overview

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

## Mechanism of Action

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

**Vancomycin**: Glycopeptide antibiotic inhibiting cell wall synthesis by binding D-Ala-D-Ala terminus of peptidoglycan precursors.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Vancomycin — 4-6 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Vancomycin — C66H75Cl2N9O24.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Vancomycin — 1449.2500 g/mol.

**Type**: Cetirizine — Small molecule; Vancomycin — Small molecule.