Being a psych nurse for 29 years, I've also worked the substance abuse/detox units.
If MJ were AS addicted to drugs as some suspect... I think that there would've been more in his system at autopsy.
As someone else said here, drug addicts take whatever is available to them.
They forget what, when, and how much of the drug was last taken.
I think that MJ became physically & mentally troubled AFTER CM became his private medical doctor.
MJ's manager and others, at the rehearsals days before MJ's death, noticed that MJ was not well.
They adsked for a conference with CM. They asked that a blood test be done on MJ, to see what was wrong with him.
CM refused both a conference & a blood (drug?) test.
As a doctor, CM has never acted ethically in treating MJ.
Even if MJ were addicted or needed to be weaned/detoxed off meds... CM should've known that he (MJ) needed to be in a hospital or highly supervised, facility, with nurses & doctors keeping track of his vital signs, his reactions, AND his physical & mental status at all times.
If MJ refused to go to a hospital or other controlled setting, he could've been papered as a danger to himself.