Diphenhydramine vs Venlafaxine

## Diphenhydramine vs Venlafaxine: Overview

This comparison examines the pharmacological differences between **Diphenhydramine** and **Venlafaxine**.

## Mechanism of Action

**Diphenhydramine**: First-generation H1 antihistamine with anticholinergic properties.

**Venlafaxine**: Serotonin-norepinephrine reuptake inhibitor (SNRI).

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Venlafaxine — 5 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Venlafaxine — C17H27NO2.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Venlafaxine — 277.4020 g/mol.

**Type**: Diphenhydramine — Small molecule; Venlafaxine — Small molecule.