Quote from Adrian Monk in Mr. Monk and the End (Part One)
Dr. Matthew Shuler: Listen, we're not talking food poisoning here. It is a lot more serious than that. This is some kind of synthetic toxin. Lt. Steven Albright: Synthetic? Dr. Matthew Shuler: Yes, and we do not know how it was introduced, but we do know the dosage is quite substantial. Adrian Monk: What? I don't understand. Dr. Malcolm Nash: You've been poisoned, Adrian. Somebody is trying to kill you. And they may have succeeded.