Topotecan, sold under the brand name Hycamtin among others, is a chemotherapeutic agent medication that is a topoisomerase inhibitor. It is a synthetic, water-soluble analog of the natural chemical compound camptothecin. It is used in the form of its hydrochloride salt to treat ovarian cancer, lung cancer and other cancer types.
After GlaxoSmithKline received final FDA approval for topotecan on October 15, 2007, it became the first topoisomerase I inhibitor for oral use.