Rabeprazole vs Sildenafil

## Rabeprazole vs Sildenafil: Overview

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

## Mechanism of Action

**Rabeprazole**: Proton pump inhibitor irreversibly inhibiting gastric H+/K+-ATPase with faster onset than omeprazole.

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

## Pharmacokinetics

**Half-life**: Rabeprazole — 1-2 hours; Sildenafil — 4 hours.

## Chemical Properties

**Molecular Formula**: Rabeprazole — C18H21N3O3S; Sildenafil — C22H30N6O4S.

**Molecular Weight**: Rabeprazole — 359.4440 g/mol; Sildenafil — 474.5800 g/mol.

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