Sildenafil vs Tamoxifen

## Sildenafil vs Tamoxifen: Overview

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

## Mechanism of Action

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

**Tamoxifen**: Selective estrogen receptor modulator (SERM).

## Pharmacokinetics

**Half-life**: Sildenafil — 4 hours; Tamoxifen — 5-7 days.

## Chemical Properties

**Molecular Formula**: Sildenafil — C22H30N6O4S; Tamoxifen — C26H29NO.

**Molecular Weight**: Sildenafil — 474.5800 g/mol; Tamoxifen — 371.5150 g/mol.

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