Sildenafil vs Topiramate

## Sildenafil vs Topiramate: Overview

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

## Mechanism of Action

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

**Topiramate**: Multiple mechanisms: Na+ channel block, GABA enhancement, glutamate inhibition.

## Pharmacokinetics

**Half-life**: Sildenafil — 4 hours; Topiramate — 21 hours.

## Chemical Properties

**Molecular Formula**: Sildenafil — C22H30N6O4S; Topiramate — C12H21NO8S.

**Molecular Weight**: Sildenafil — 474.5800 g/mol; Topiramate — 339.3630 g/mol.

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