Ranitidine vs Sildenafil

## Ranitidine vs Sildenafil: Overview

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

## Mechanism of Action

**Ranitidine**: Competitive H2 receptor antagonist.

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

## Pharmacokinetics

**Half-life**: Ranitidine — 2-3 hours; Sildenafil — 4 hours.

## Chemical Properties

**Molecular Formula**: Ranitidine — C13H22N4O3S; Sildenafil — C22H30N6O4S.

**Molecular Weight**: Ranitidine — 314.4050 g/mol; Sildenafil — 474.5800 g/mol.

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