Ok so I'm reading this book called "The Poet" by Michael Connelly and in it the killer is using Hypnosis combined with a drug such as Codine or Cough Syrup to give the victim a highened hypnotic trance.
My question is, can a drug such as Cough Syrup lead to a better trance? Or make it easier to enter a trance? And if so is it safe to take something like that before hand?
Hopefully someone has had some experience with this. Thanks.