Citalopram vs Upadacitinib

## Citalopram vs Upadacitinib: Overview

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

## Mechanism of Action

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

**Upadacitinib**: Selective JAK1 inhibitor reducing signaling from cytokines implicated in autoimmune diseases.

## Pharmacokinetics

**Half-life**: Citalopram — 35 hours; Upadacitinib — 9-14 hours.

## Chemical Properties

**Molecular Formula**: Citalopram — C20H21FN2O; Upadacitinib — C17H19F3N6O.

**Molecular Weight**: Citalopram — 324.3920 g/mol; Upadacitinib — 380.3700 g/mol.

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