My friend's father was on some form of opioid for much of my friend's life, due to a motorcycle accident that busted both his knees. Towards the end, he was on

My friend's father was on some form of opioid for much of my friend's life, due to a motorcycle accident that busted both his knees. Towards the end, he was on Actiq, a lozenge form of fentanyl citrate iirc. Supposedly it was strong enough to be fatal for someone without any opioid tolerance. These pills are probably much the same. Strong enough to get someone high who has built up a tolerance to everything else, but also strong enough to kill the uninitiated.