I wouldnt risk sleeping on psycadelics, you have the possibility of having a bad dream that is lifelike and can scar you for the rest of your life. just happened to a friend of mine, took 2 hits of acid went to sleep and had a bad dream and he was all fucked up the next day (like nervous and acting kinda shy and weird) plus its a damn waste of money if you sleep your drugs off, i stayed up from 8 am one day to 4:30 pm the next day cause i was on the same 2 hits that my friend was.