Diphenhydramine vs Quetiapine

## Diphenhydramine vs Quetiapine: Overview

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

## Mechanism of Action

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

**Quetiapine**: Atypical antipsychotic; antagonist at multiple receptors.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Quetiapine — 6 hours.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Quetiapine — C21H25N3O2S.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Quetiapine — 383.5100 g/mol.

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