The Division of Drug Information (DDI) is CDER's focal point for public inquiries. We serve the public by providing information on human drug products and drug product regulation by FDA.
The U.S. Food and Drug Administration approved Lonsurf (a pill that combines two drugs, trifluridine and tipiracil) for patients with an advanced form of colorectal cancer who are no longer responding to other therapies.
Lonsurf is an oral medication intended to treat patients with advanced (metastatic) colorectal cancer who have been previously treated with chemotherapy and biological therapy.
The efficacy and safety of Lonsurf were evaluated in an international, randomized, double-blind study involving 800 patients with previously treated metastatic colorectal cancer.
The most common side effects of treatment with Lonsurf are anemia, a decrease in infection-fighting white blood cells (neutropenia) or blood platelets (thrombocytopenia), physical weakness, extreme tiredness and lack of energy (fatigue), nausea, decreased appetite, diarrhea, vomiting, abdominal pain and fever.
The FDA recommends that health care providers obtain complete blood counts prior to starting each treatment cycle of Lonsurf and monitor patients throughout treatment, as Lonsurf may cause a severe decrease in blood cell and platelet production (myelosuppression).
Healthcare providers are also encouraged to advise women of potential risks to developing fetuses when taking Lonsurf. Women who are taking Lonsurf should not breastfeed.
For more information please visit: Lonsurf