Acetaminophen vs Methotrexate

## Acetaminophen vs Methotrexate: Overview

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

## Mechanism of Action

**Acetaminophen**: Inhibits prostaglandin synthesis in the CNS and peripherally blocks pain impulse generation.

**Methotrexate**: Dihydrofolate reductase inhibitor.

## Pharmacokinetics

**Half-life**: Acetaminophen — 1-4 hours; Methotrexate — 3-10 hours.

## Chemical Properties

**Molecular Formula**: Acetaminophen — C8H9NO2; Methotrexate — C20H22N8O5.

**Molecular Weight**: Acetaminophen — 151.1630 g/mol; Methotrexate — 454.4400 g/mol.

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