Cephalexin vs Metronidazole

Cephalexin vs Metronidazole: Overview

This comparison examines the pharmacological differences between Cephalexin and Metronidazole.

Mechanism of Action

Cephalexin: First-generation cephalosporin inhibiting cell wall synthesis.

Metronidazole: Forms cytotoxic free radicals that damage bacterial DNA.

Pharmacokinetics

Half-life: Cephalexin — 0.5-1.2 hours; Metronidazole — 8 hours.

Chemical Properties

Molecular Formula: Cephalexin — C16H17N3O4S; Metronidazole — C6H9N3O3.

Molecular Weight: Cephalexin — 347.3890 g/mol; Metronidazole — 171.1540 g/mol.

Type: Cephalexin — Small molecule; Metronidazole — Small molecule.