Which side effects should I call about right now?

Fever. Shaking chills. Bleeding that will not stop. Chest pain. Trouble breathing. Severe vomiting or diarrhea you cannot keep up with. A new confusion. Sudden severe pain.

Photograph this card. There is always a number that reaches a real person, day or night. Write it on the back now, before you need it.

Written by two physicians. Checked against patient information from the US National Cancer Institute and Cancer Research UK.