Cetirizine vs Diphenhydramine Hydrochloride

## Cetirizine vs Diphenhydramine Hydrochloride: Overview

This comparison examines the pharmacological differences between **Cetirizine** and **Diphenhydramine Hydrochloride**.

## Mechanism of Action

**Cetirizine**: Second-generation H1 antihistamine.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Diphenhydramine Hydrochloride — N/A.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Diphenhydramine Hydrochloride — N/A.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Diphenhydramine Hydrochloride — N/A.

**Type**: Cetirizine — Small molecule; Diphenhydramine Hydrochloride — Small molecule.