I've seen a few admit to drugs on their websites (MAry Carey, but it could have been as a joke sorta saying sex, drugs & rock n roll is her life), Kitty Marie (when she had a site), Jessica Darlin has talked about it somewhere.
Someone should say, ok, look we want you to "act" as a real junkie for this film. Oh, we'll use real coke... (no fake shit for us)
we'll just take it out of your paycheck.