Cephalexin vs Fentanyl

## Cephalexin vs Fentanyl: Overview

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

## Mechanism of Action

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

**Fentanyl**: Highly potent synthetic mu-opioid receptor agonist approximately 100 times more potent than morphine.

## Pharmacokinetics

**Half-life**: Cephalexin — 0.5-1.2 hours; Fentanyl — 2-4 hours.

## Chemical Properties

**Molecular Formula**: Cephalexin — C16H17N3O4S; Fentanyl — C22H28N2O.

**Molecular Weight**: Cephalexin — 347.3890 g/mol; Fentanyl — 336.4700 g/mol.

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