Acetaminophen vs Cephalexin

## Acetaminophen vs Cephalexin: Overview

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

## Mechanism of Action

**Acetaminophen**: Inhibits prostaglandin synthesis in the CNS and peripherally blocks pain impulse generation.

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

## Pharmacokinetics

**Half-life**: Acetaminophen — 1-4 hours; Cephalexin — 0.5-1.2 hours.

## Chemical Properties

**Molecular Formula**: Acetaminophen — C8H9NO2; Cephalexin — C16H17N3O4S.

**Molecular Weight**: Acetaminophen — 151.1630 g/mol; Cephalexin — 347.3890 g/mol.

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