Methotrexate vs Valproic Acid

## Methotrexate vs Valproic Acid: Overview

This comparison examines the pharmacological differences between **Methotrexate** and **Valproic Acid**.

## Mechanism of Action

**Methotrexate**: Dihydrofolate reductase inhibitor.

**Valproic Acid**: Enhances GABA transmission and blocks sodium/calcium channels.

## Pharmacokinetics

**Half-life**: Methotrexate — 3-10 hours; Valproic Acid — 9-16 hours.

## Chemical Properties

**Molecular Formula**: Methotrexate — C20H22N8O5; Valproic Acid — C8H16O2.

**Molecular Weight**: Methotrexate — 454.4400 g/mol; Valproic Acid — 144.2110 g/mol.

**Type**: Methotrexate — Small molecule; Valproic Acid — Small molecule.