Methotrexate vs Montelukast

## Methotrexate vs Montelukast: Overview

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

## Mechanism of Action

**Methotrexate**: Dihydrofolate reductase inhibitor.

**Montelukast**: Selective leukotriene D4 receptor antagonist.

## Pharmacokinetics

**Half-life**: Methotrexate — 3-10 hours; Montelukast — 2.7-5.5 hours.

## Chemical Properties

**Molecular Formula**: Methotrexate — C20H22N8O5; Montelukast — C35H36ClNO3S.

**Molecular Weight**: Methotrexate — 454.4400 g/mol; Montelukast — 586.1800 g/mol.

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