Likely stored in a tic tac dispenser

Patient: "I need some penicillin."

Me: "Why? What's bothering you?"

Patient: "Nothing's wrong. Penicillin just makes me feel better. I bought it over the counter all the time in Mexico."

Me: "I only prescribe antibiotics when they're necessary, when there's an infection."

Patient: "Doctor, you don't understand. I take penicillin like candy!"

Me: "That's exactly why I'm not going to prescribe it for you."