I'm sorry for your loss -deepest Sympathies. There are, as you know already, major reports stating that LEGAL MARIJUANA states, have fewer Opioid deaths than PROHIBITION states nd it's believed to be the net result of having legal marijuana accessible to folks!
I'm sorry you went through that experience. One of my good friends OD'd after leaving rehab. It is a sickness that the doctors and lobbyists have facilitated. Change is coming though.