Afatinib vs Trimethoprim

## Afatinib vs Trimethoprim: Overview

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

## Mechanism of Action

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

**Trimethoprim**: Dihydrofolate reductase inhibitor (bacterial selective).

## Pharmacokinetics

**Half-life**: Afatinib — 37 hours; Trimethoprim — 8-10 hours.

## Chemical Properties

**Molecular Formula**: Afatinib — C24H25ClFN5O3; Trimethoprim — C14H18N4O3.

**Molecular Weight**: Afatinib — 485.9400 g/mol; Trimethoprim — 290.3180 g/mol.

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