TOPOTU 4 mg (Topotecan Injection) is a prescription chemotherapy medicine used in the treatment of certain solid tumors, including ovarian cancer, small‑cell lung cancer, and select cases of cervical cancer. Topotecan is a topoisomerase I inhibitor that interferes with DNA replication in rapidly dividing cancer cells, slowing tumor growth and aiding disease management. TOPOTU is administered by intravenous infusion under the supervision of trained healthcare professionals and requires regular blood monitoring throughout treatment to manage side effects and ensure safe therapy.