Diphenhydramine vs Hydroxychloroquine

## Diphenhydramine vs Hydroxychloroquine: Overview

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

## Mechanism of Action

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

**Hydroxychloroquine**: Accumulates in lysosomes raising pH; inhibits toll-like receptor signaling.

## Pharmacokinetics

**Half-life**: Diphenhydramine — 2-8 hours; Hydroxychloroquine — 40-50 days.

## Chemical Properties

**Molecular Formula**: Diphenhydramine — C17H21NO; Hydroxychloroquine — C18H26ClN3O.

**Molecular Weight**: Diphenhydramine — 255.3550 g/mol; Hydroxychloroquine — 335.8720 g/mol.

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