Cetirizine vs Upadacitinib

## Cetirizine vs Upadacitinib: Overview

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

## Mechanism of Action

**Cetirizine**: Second-generation H1 antihistamine.

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

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Upadacitinib — 9-14 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Upadacitinib — C17H19F3N6O.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Upadacitinib — 380.3700 g/mol.

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