Cephalexin vs Norfloxacin

## Cephalexin vs Norfloxacin: Overview

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

## Mechanism of Action

**Cephalexin**: First-generation cephalosporin inhibiting cell wall synthesis.

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

## Pharmacokinetics

**Half-life**: Cephalexin — 0.5-1.2 hours; Norfloxacin — 3-4 hours.

## Chemical Properties

**Molecular Formula**: Cephalexin — C16H17N3O4S; Norfloxacin — C16H18FN3O3.

**Molecular Weight**: Cephalexin — 347.3890 g/mol; Norfloxacin — 319.3310 g/mol.

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