This one's only tangentially related to Frank Zappa, but I figured I'd include it because it's a fun read (for certain values of "fun"). I just saw this in a BoingBoing post by Mark Frauenfelder: The Belladonna Shaman, by RU Sirius, detailing his experience, at the age of 15, taking a recreational drug called asthmador, which, as the title implies, contained belladonna.
So what's this got to do with Frank Zappa?
I entered Our Lady of Lords Hospital wrapped up in a straightjacket and was immediately given a shot of morphine. Once they got me to stop flailing, they were able to find my wallet. They pulled it out to see who I was. In those far less paranoid times, teenagers didn’t necessarily carry ID cards. But my friend Vinnie had found these sort-of IDs that had a space on them to write your name and address and phone number and we’d had some fun one night writing the names of our heroes, or of odd characters, onto the cards and sticking them in our wallets. I had two cards on which I had written two different names. Since the admission authorities knew I wasn’t Ho Chi Minh, they figured the other ID must be the correct one. I was admitted as Frank Zappa.
So, uh, don't do belladonna, kids.
(And, ironically, Zappa was pretty vocally opposed to drug use.)