Cetirizine vs Donepezil

## Cetirizine vs Donepezil: Overview

This comparison examines the pharmacological differences between **Cetirizine** and **Donepezil**.

## Mechanism of Action

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

**Donepezil**: Reversible acetylcholinesterase inhibitor.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Donepezil — 70 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Donepezil — C24H29NO3.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Donepezil — 379.4920 g/mol.

**Type**: Cetirizine — Small molecule; Donepezil — Small molecule.