What is irinotecan?
Irinotecan, also known as CPT-11 and Camptosar®, is a drug that stops cancer cells from growing by inhibiting a key step in cell division. Specifically, irinotecan inhibits an enzyme known as topoisomerase that normally allows the cell’s DNA, or genetic material, to unwind during the process of cell division. When cell division is stopped, the cancer ceases growing.