Afatinib vs Cetirizine

## Afatinib vs Cetirizine: Overview

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

## Mechanism of Action

**Afatinib**: Irreversible covalent inhibitor of ErbB family (EGFR/HER1, HER2, HER4) tyrosine kinases.

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

## Pharmacokinetics

**Half-life**: Afatinib — 37 hours; Cetirizine — 6.5-10 hours.

## Chemical Properties

**Molecular Formula**: Afatinib — C24H25ClFN5O3; Cetirizine — C21H25ClN2O3.

**Molecular Weight**: Afatinib — 485.9400 g/mol; Cetirizine — 388.8900 g/mol.

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