Mrs. Flake: "I stopped taking my epilepsy medication last week. It was causing all kinds of terrible side effects."
Dr. Grumpy: "But... You've taken ShakeAway for 5 years, and never had a problem with it before."
Mrs. Flake: "Well, I took my pills at bedtime one night, like I normally do. And the next morning I woke up with a fever and sore throat. I was achy all over, and my nose was stuffy. After 2 days of this I realized it was probably from ShakeAway, and stopped it. The next day I was feeling better, so it must have been the drug."
Dr. Grumpy: "Ma'am, it sounds like you just had a cold. That's all. The medicine had nothing to do with it. Let me give you a schedule to restart it."
Mrs. Flake: "That poison! I just told you, it made me sick! Don't you listen? I refuse to start it again."