It would be the same as meth and any narcotic really... and as is the case for these combos - they are generally lots of fun... and as long as you're not speedballing, it's safe too!
I am sure someone else can give a trip report..
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"I am not one of those weak-spirited, sappy Americans who want to be liked by all the people around them. I don't care if people hate my guts; I assume most of them do. The important question is: 'What are they in a position to do about it?'" (William S. Burroughs)