This article originally appeared on Undark. When chatting at cocktail parties about his job, Mark Ratain, an oncologist and pharmacologist at the University of Chicago, often asks a short riddle: "Your doctor gives you a prescription for a new drug. The pharmacist says, 'Make sure you take it on an empty stomach, twice a day.' What do you think would happen if you took it with food?" Most don't get the answer right. "Nobody would ever say, 'Well, I could die from an overdose,'" Ratain says. Advertisement: That's exactly what could happen to anyone taking the drug nilotinib — approved by the...