Cephalexin vs Cetirizine

## Cephalexin vs Cetirizine: Overview

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

## Mechanism of Action

**Cephalexin**: First-generation cephalosporin inhibiting cell wall synthesis.

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

## Pharmacokinetics

**Half-life**: Cephalexin — 0.5-1.2 hours; Cetirizine — 6.5-10 hours.

## Chemical Properties

**Molecular Formula**: Cephalexin — C16H17N3O4S; Cetirizine — C21H25ClN2O3.

**Molecular Weight**: Cephalexin — 347.3890 g/mol; Cetirizine — 388.8900 g/mol.

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