Cephalexin vs Polymyxin B

## Cephalexin vs Polymyxin B: Overview

This comparison examines the pharmacological differences between **Cephalexin** and **Polymyxin B**.

## Mechanism of Action

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

## Pharmacokinetics

**Half-life**: Cephalexin — 0.5-1.2 hours; Polymyxin B — N/A.

## Chemical Properties

**Molecular Formula**: Cephalexin — C16H17N3O4S; Polymyxin B — N/A.

**Molecular Weight**: Cephalexin — 347.3890 g/mol; Polymyxin B — N/A.

**Type**: Cephalexin — Small molecule; Polymyxin B — Protein.