Diphenhydramine vs Norfloxacin

## Diphenhydramine vs Norfloxacin: Overview

This comparison examines the pharmacological differences between **Diphenhydramine** and **Norfloxacin**.

## Mechanism of Action

**Diphenhydramine**: First-generation H1 antihistamine with anticholinergic properties.

**Norfloxacin**: Second-generation fluoroquinolone inhibiting bacterial DNA gyrase and topoisomerase IV.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Norfloxacin — 3-4 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Norfloxacin — C16H18FN3O3.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Norfloxacin — 319.3310 g/mol.

**Type**: Diphenhydramine — Small molecule; Norfloxacin — Small molecule.