can be dangerous, to both mental and physical health ( especially if old, or cut with garbage). Fisrt time should be with experienced, genuine, intelligent friends. ( Not the kind that may lead you into stupidity) But if in correct setting, without abuse, can be quite enlightening. But be prepared to see things as never before. (Again, physically, and mentally) Should be in no rush, or have things to do for a day or two after a good one, you will fell like mush when done. Rumor has it that Oj after kicks it back around the system, but I think that's been disproved since. Try to have a calming thought before doing any, you will get revved. Would not recommend for those above 25? and with a job that requires any kind awareness, just my 2 cents