Cetirizine vs Theophylline

## Cetirizine vs Theophylline: Overview

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

## Mechanism of Action

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

## Pharmacokinetics

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

## Chemical Properties

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

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

**Type**: Cetirizine — Small molecule; Theophylline — Protein.