Cetirizine vs Lorazepam

## Cetirizine vs Lorazepam: Overview

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

## Mechanism of Action

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

**Lorazepam**: Intermediate-acting benzodiazepine enhancing GABA-A receptor chloride conductance.

## Pharmacokinetics

**Half-life**: Cetirizine — 6.5-10 hours; Lorazepam — 10-20 hours.

## Chemical Properties

**Molecular Formula**: Cetirizine — C21H25ClN2O3; Lorazepam — C15H10Cl2N2O2.

**Molecular Weight**: Cetirizine — 388.8900 g/mol; Lorazepam — 321.1580 g/mol.

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