Doxycycline vs Sildenafil

## Doxycycline vs Sildenafil: Overview

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

## Mechanism of Action

**Doxycycline**: Inhibits bacterial protein synthesis by binding 30S ribosomal subunit.

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

## Pharmacokinetics

**Half-life**: Doxycycline — 18-22 hours; Sildenafil — 4 hours.

## Chemical Properties

**Molecular Formula**: Doxycycline — C22H24N2O8; Sildenafil — C22H30N6O4S.

**Molecular Weight**: Doxycycline — 444.4350 g/mol; Sildenafil — 474.5800 g/mol.

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