Cephalexin vs Sildenafil

## Cephalexin vs Sildenafil: Overview

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

## Mechanism of Action

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

**Sildenafil**: Selective PDE5 inhibitor increasing cGMP.

## Pharmacokinetics

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

## Chemical Properties

**Molecular Formula**: Cephalexin — C16H17N3O4S; Sildenafil — C22H30N6O4S.

**Molecular Weight**: Cephalexin — 347.3890 g/mol; Sildenafil — 474.5800 g/mol.

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