Cetirizine vs Paroxetine

## Cetirizine vs Paroxetine: Overview

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

## Mechanism of Action

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

**Paroxetine**: Potent selective serotonin reuptake inhibitor with additional muscarinic and NE reuptake inhibition.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Paroxetine — 21 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Paroxetine — C19H20FNO3.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Paroxetine — 329.3730 g/mol.

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