Atezolizumab vs Citalopram

## Atezolizumab vs Citalopram: Overview

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

## Mechanism of Action

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

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

## Pharmacokinetics

**Half-life**: Atezolizumab — 27 days; Citalopram — 35 hours.

## Chemical Properties

**Molecular Formula**: Atezolizumab — N/A; Citalopram — C20H21FN2O.

**Molecular Weight**: Atezolizumab — N/A; Citalopram — 324.3920 g/mol.

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