At one point in my drug usage I enjoyed mixing crystal and Herion in moderate amounts.same with other opiates, never had bad experiences until last year i induced by combining the 2. I was rushed to the ER mind you I had no preexisting heart problems and for those who don't know VTach is very dangerous heart arrhythmia. It was traumatizing in a way. Only 22 yrs oldis insane to have induced that....I did feel pretty good before everything went downhill though Lol