Gefitinib vs Tamoxifen

## Gefitinib vs Tamoxifen: Overview

This comparison examines the pharmacological differences between **Gefitinib** and **Tamoxifen**.

## Mechanism of Action

**Gefitinib**: Selective reversible inhibitor of EGFR tyrosine kinase.

**Tamoxifen**: Selective estrogen receptor modulator (SERM).

## Pharmacokinetics

**Half-life**: Gefitinib — 48 hours; Tamoxifen — 5-7 days.

## Chemical Properties

**Molecular Formula**: Gefitinib — C22H24ClFN4O3; Tamoxifen — C26H29NO.

**Molecular Weight**: Gefitinib — 446.9000 g/mol; Tamoxifen — 371.5150 g/mol.

**Type**: Gefitinib — Small molecule; Tamoxifen — Small molecule.