I've had dope cut with coke before....it sucks! I don't get down with stims, but coke is ok because it doesnt last too long and the rush IV'ed is awesome, smokin it is pretty good too. But i HAVE to have dope or benzos or something to come down with.
But anyways, some dealers will cut their shit with coke if its shitty dope to begin with. The times i have seen coke in there it was always scramble in gelcaps, not the good raw dope that comes in vials/bags. Funny enough, the dope that was cut with coke at the time was called Martha Stewart hahaha i geuss cause it was a concaction of anything laying around to mix together that might give you a buzz. hah...