Drinks that induce drowsiness

Exploration Stage: Moroccan Cafe
From: Sophia
Description: I could have spent a whole day here with just one cup of coffee. I also ordered several cakes. What was I thinking? If I ate that much sweet food, I would be out of shape. Could it be something in the drinks? Let's check the coffee pot on my table. It's still there.
Completed: Thanks for taking the coffee pot. I carry this powder with me at all times in case some overzealous fan might try to put me to sleep and kidnap me. If your drink has alcohol in it, it will change color when you mix this powder. Let's mix a little with the rest of the coffee...no change. Then the drink seems to be different.