Methotrexate vs Phenytoin

## Methotrexate vs Phenytoin: Overview

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

## Mechanism of Action

**Methotrexate**: Dihydrofolate reductase inhibitor.

**Phenytoin**: Sodium channel blocker stabilizing inactive state.

## Pharmacokinetics

**Half-life**: Methotrexate — 3-10 hours; Phenytoin — 22 hours.

## Chemical Properties

**Molecular Formula**: Methotrexate — C20H22N8O5; Phenytoin — C15H12N2O2.

**Molecular Weight**: Methotrexate — 454.4400 g/mol; Phenytoin — 252.2680 g/mol.

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