Cetirizine vs Topiramate

## Cetirizine vs Topiramate: Overview

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

## Mechanism of Action

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

**Topiramate**: Multiple mechanisms: Na+ channel block, GABA enhancement, glutamate inhibition.

## Pharmacokinetics

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

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Topiramate — C12H21NO8S.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Topiramate — 339.3630 g/mol.

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