i have the same theory regarding murray using benzos to keep mj sedated over the night, and use propofol only for "show effect" to induce sleep. i was posting this here last year when we discussed the autopsy report.
i also wonder whether murray always gave a second propofol bolus when mj was waking up, and he messed it up on june 25 because he was distracted by his gf and gave the bolus too fast. this would also explain why he had a propofol bolus ready at hand when he realized mj was coughing and waking up.
my theory is: when mj showed first signs of waking up murray injected a propofol bolus, quickly followed by a flumazenil injection to counter the benzo effect. i believe he had to do this because propofol has a specific "wake-up feel" which to my knowledge is very different to waking up from lorazepam. i dont think murray could have fooled mj unless he gave him a propofol shot at wake-up time and made sure the benzo-effect wore off quickly.
i actually do not believe that mj had already developed a dependency on lorazepam, if/when/which withdrawal symptoms show is individually different. but going by ortegas testimony it seems first signs something was wrong were showing the week before mj died.
i'm not sure whether murray had intended for mj to develop a dependency, i rather believe he just didn't care and thought he could somehow handle the situation. to murray it was much more important to secure his contract with aeg, and to use benzos and a few propofol bolus shots for "show effect" was (in his opinion) a smart way to give mj the feeling no drugs who can cause dependency were administered, but the same time there was no need for him to have the kind of equipment and training needed to administer propofol: an iv stand, oxygen tanks, an ambu bag, a pulse oxinometer.. all these things were in the room, how was mj to know a propofol infusion is always given by using an iv pump, that an ambu bag is not the same thing as intubation equipment? this would explain his incredible recklessness not to have intubation equipment in the room when sedating a patient with propofol. murray obviously felt the small amounts of propofol he'd actually inject wouldn't cause any problems... well, he was wrong.
to reduce withdrawal symptoms i believe murray gave mj diazepam which has a long half life. diazepam was found in the body. read here about diazepam to wean patients of lorazepam:
http://www.non-benzodiazepines.org.uk/lorazepam.html
i have read that flumazenil could be helpful too to keep withdrawal symptoms in check. read here:
another thing i believe murray gave to subdue the effect of the benzos is ephedrine. ephedrine was found in the urine and eca stack pills were found in the hidden bag. i wondered why no aspirin was found in urine, half lifes of ephedrine and aspirin are not so different to my knowledge. but i think i've figured it out:
they found orange juice at mj's bedside, mj was probably drinking juice before he went to bed. orange juice leads to urine alkalinization which means aspirin (salicylate) is eliminated faster, while at the same time ephedrine takes longer to leave:
can someone with medical knowledge comment if this theory makes sense? thanks