Methotrexate vs Paroxetine

## Methotrexate vs Paroxetine: Overview

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

## Mechanism of Action

**Methotrexate**: Dihydrofolate reductase inhibitor.

**Paroxetine**: Potent selective serotonin reuptake inhibitor with additional muscarinic and NE reuptake inhibition.

## Pharmacokinetics

**Half-life**: Methotrexate — 3-10 hours; Paroxetine — 21 hours.

## Chemical Properties

**Molecular Formula**: Methotrexate — C20H22N8O5; Paroxetine — C19H20FNO3.

**Molecular Weight**: Methotrexate — 454.4400 g/mol; Paroxetine — 329.3730 g/mol.

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