I have taken suboxone when I use to take painkillers - eg. roxycodone/oxycodone/Vicodin/percocet it worked amazingly and was SO easy in comparison to get clean as to now where I most recently was using fentanyl which was unbeknownst to me at the time of my most recent trip to detox - I now believe I am getting a cleaner substance and I believe it is heroin but I still do not know for absolute certainty. The withdrawals still aren’t nearly as bad as they used to be although are absolutely nightmarish - which is saying something. 