Methotrexate vs Osimertinib

## Methotrexate vs Osimertinib: Overview

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

## Mechanism of Action

**Methotrexate**: Dihydrofolate reductase inhibitor.

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

## Pharmacokinetics

**Half-life**: Methotrexate — 3-10 hours; Osimertinib — 48 hours.

## Chemical Properties

**Molecular Formula**: Methotrexate — C20H22N8O5; Osimertinib — C28H33N7O2.

**Molecular Weight**: Methotrexate — 454.4400 g/mol; Osimertinib — 499.6050 g/mol.

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