Cetirizine vs Levofloxacin

## Cetirizine vs Levofloxacin: Overview

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

## Mechanism of Action

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

**Levofloxacin**: Fluoroquinolone antibiotic inhibiting bacterial DNA gyrase and topoisomerase IV.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Levofloxacin — 6-8 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Levofloxacin — C18H20FN3O4.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Levofloxacin — 361.3680 g/mol.

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