Cases are now Monday and Thursday rather than Monday, Wednesday, Friday. See announcement below this post.
A 25 year man is brought into the emergency department by his friends because he is "acting weird." The patient is irritable, angry, and restless. He says, "I can't concentrate or sleep. I'm anxious and sad. I keep eating. I quit 3 days ago, but I can't handle it. This is too much. My friends say I'm going to gain weight and get depressed too."
Challenge: What did he quit?
Image is in the public domain.