I assume one of the drugs provided would include fentanyl -- why limit one?Can be. You think the government has the just authority to tell you what you can and can't put into your body?
Or do you just want users dying from overdoses and fentanyl-laced street drugs?
I guess the druggie would have more knowledge of what the dose of drug he had was which may reduce the risk of overdose but that problem is not one that is high on my list of problems. You do the drugs you takes your chances. I also think making it more available may make it more likely somebody will overdose who may not have used street drugs as they were slightly harder or more intimidating to get.