> But nicotine and caffeine aren’t chemically similar, not really. When I covered the health effects of nicotine last year, I asked Adam Leventhal, director of

> But nicotine and caffeine aren’t chemically similar, not really. When I covered the health effects of nicotine last year, I asked Adam Leventhal, director of the USC Health, Emotion, and Addiction Laboratory, how the two drugs compared. “They’re apples and oranges,” he told me, citing a long list of distressing caffeine withdrawal symptoms like anxiety, depression, irritability, and hunger. Oh whups. I made a typo there. Can you guess which word?