Why do people say there is opium in this pastry?

Asked by troubleinharlem (7991) November 2nd, 2009 from iPhone

I had a lemon poppyseed muffin this morning, and a friend told me that if I took a drug test, that I would test positive.

Is that true? It seems completely ridiculous. Besides, if that was my excuse then they probably wouldn’t believe me.

yay for random but interesting questions!