Osimertinib vs Tofacitinib

## Osimertinib vs Tofacitinib: Overview

This comparison examines the pharmacological differences between **Osimertinib** and **Tofacitinib**.

## Mechanism of Action

**Osimertinib**: Third-generation irreversible EGFR TKI targeting T790M resistance mutation and activating mutations.

**Tofacitinib**: Pan-JAK inhibitor with preference for JAK1 and JAK3 blocking pro-inflammatory cytokine signaling.

## Pharmacokinetics

**Half-life**: Osimertinib — 48 hours; Tofacitinib — 3.2 hours.

## Chemical Properties

**Molecular Formula**: Osimertinib — C28H33N7O2; Tofacitinib — C16H20N6O.

**Molecular Weight**: Osimertinib — 499.6050 g/mol; Tofacitinib — 312.3700 g/mol.

**Type**: Osimertinib — Small molecule; Tofacitinib — Small molecule.