Afatinib vs Phenytoin

## Afatinib vs Phenytoin: Overview

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

## Mechanism of Action

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

**Phenytoin**: Sodium channel blocker stabilizing inactive state.

## Pharmacokinetics

**Half-life**: Afatinib — 37 hours; Phenytoin — 22 hours.

## Chemical Properties

**Molecular Formula**: Afatinib — C24H25ClFN5O3; Phenytoin — C15H12N2O2.

**Molecular Weight**: Afatinib — 485.9400 g/mol; Phenytoin — 252.2680 g/mol.

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