A doctor or other trained health professional will give you this medicine in a hospital or cancer treatment center. This medicine is given through a needle placed in one of your veins.
Irinotecan often causes nausea and vomiting. However, it is very important that you continue to receive this medicine even if you begin to feel ill. You may receive other medicines to help with the nausea and vomiting. Ask your doctor for other ways to lessen these effects.