Irinotecan 100 mg Injection — Chemotherapy for Metastatic Colorectal & Solid Tumors Irinotecan 100 mg is an anticancer chemotherapy injection containing irinotecan hydrochloride, a topoisomerase I inhibitor used to treat metastatic colorectal cancer and other solid tumors under specialist oncology care. Administered via intravenous infusion by trained healthcare professionals in hospital or cancer centers, irinotecan works by disrupting cancer cell DNA replication, slowing tumor growth and spread. Due to its potent effects, this therapy requires strict medical supervision, regular blood monitoring, and management of common side effects such as severe diarrhea, nausea, and low blood counts. Irinotecan is available with a valid prescription at leading Pakistani oncology pharmacies and hospitals, including branded products and generics in 100 mg vial formulations. Patients should follow their oncologist’s plan closely to optimize treatment safety and effectiveness.