Gefitinib vs Rituximab

## Gefitinib vs Rituximab: Overview

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

## Mechanism of Action

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

**Rituximab**: Chimeric anti-CD20 IgG1 monoclonal antibody inducing B-cell depletion via CDC, ADCC, and apoptosis.

## Pharmacokinetics

**Half-life**: Gefitinib — 48 hours; Rituximab — 22 days.

## Chemical Properties

**Molecular Formula**: Gefitinib — C22H24ClFN4O3; Rituximab — N/A.

**Molecular Weight**: Gefitinib — 446.9000 g/mol; Rituximab — N/A.

**Type**: Gefitinib — Small molecule; Rituximab — Antibody.