Methotrexate vs Trastuzumab

## Methotrexate vs Trastuzumab: Overview

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

## Mechanism of Action

**Methotrexate**: Dihydrofolate reductase inhibitor.

**Trastuzumab**: Anti-HER2 monoclonal antibody inhibiting receptor signaling.

## Pharmacokinetics

**Half-life**: Methotrexate — 3-10 hours; Trastuzumab — 28 days.

## Chemical Properties

**Molecular Formula**: Methotrexate — C20H22N8O5; Trastuzumab — N/A.

**Molecular Weight**: Methotrexate — 454.4400 g/mol; Trastuzumab — N/A.

**Type**: Methotrexate — Small molecule; Trastuzumab — Antibody.