Metronidazole vs Sildenafil

## Metronidazole vs Sildenafil: Overview

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

## Mechanism of Action

**Metronidazole**: Forms cytotoxic free radicals that damage bacterial DNA.

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

## Pharmacokinetics

**Half-life**: Metronidazole — 8 hours; Sildenafil — 4 hours.

## Chemical Properties

**Molecular Formula**: Metronidazole — C6H9N3O3; Sildenafil — C22H30N6O4S.

**Molecular Weight**: Metronidazole — 171.1540 g/mol; Sildenafil — 474.5800 g/mol.

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