psilosybe cubensis, Delta-9 tetra-hydro-cannibol, ethanol, tabacco, nitrous-oxide, vercuronium, pentothal, adenosine, methyldopa, oxygen....haliperadol, hell, even rohyphnol! LOL! I'm a nurse silly, they make you do these drugs! (OK you're expected to study the pharmacology of them...not actually take them, but hey, I got a bit confused at university...) :-)>