Cetirizine vs Simvastatin

## Cetirizine vs Simvastatin: Overview

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

## Mechanism of Action

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

**Simvastatin**: Prodrug converted to active form that inhibits HMG-CoA reductase.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Simvastatin — 2 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Simvastatin — C25H38O5.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Simvastatin — 418.5700 g/mol.

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