Citalopram vs Sildenafil

## Citalopram vs Sildenafil: Overview

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

## Mechanism of Action

**Citalopram**: Selective serotonin reuptake inhibitor (SSRI); racemic mixture with escitalopram as active S-enantiomer.

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

## Pharmacokinetics

**Half-life**: Citalopram — 35 hours; Sildenafil — 4 hours.

## Chemical Properties

**Molecular Formula**: Citalopram — C20H21FN2O; Sildenafil — C22H30N6O4S.

**Molecular Weight**: Citalopram — 324.3920 g/mol; Sildenafil — 474.5800 g/mol.

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