Atezolizumab vs Sildenafil

## Atezolizumab vs Sildenafil: Overview

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

## Mechanism of Action

**Atezolizumab**: Fully human anti-PD-L1 IgG1 monoclonal antibody blocking PD-L1 interaction with PD-1 and B7.1.

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

## Pharmacokinetics

**Half-life**: Atezolizumab — 27 days; Sildenafil — 4 hours.

## Chemical Properties

**Molecular Formula**: Atezolizumab — N/A; Sildenafil — C22H30N6O4S.

**Molecular Weight**: Atezolizumab — N/A; Sildenafil — 474.5800 g/mol.

**Type**: Atezolizumab — Antibody; Sildenafil — Small molecule.