Methotrexate vs Upadacitinib

## Methotrexate vs Upadacitinib: Overview

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

## Mechanism of Action

**Methotrexate**: Dihydrofolate reductase inhibitor.

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

## Pharmacokinetics

**Half-life**: Methotrexate — 3-10 hours; Upadacitinib — 9-14 hours.

## Chemical Properties

**Molecular Formula**: Methotrexate — C20H22N8O5; Upadacitinib — C17H19F3N6O.

**Molecular Weight**: Methotrexate — 454.4400 g/mol; Upadacitinib — 380.3700 g/mol.

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