I don't know how you could mange to fulfill these requirements and I don't even know if it will work but.. Stop taking the opioid. .. start having 20 mg waffle olanzapine... should knock you out for a good period of time. In events of waking eat food drink water obtain oxycodone and have 20-40 mgs to start with and drink the highest concentrate alcohol found, like 3 or 4 shots simultaneously then have another olanzapine wafer. Should get more sleep. Repeat process but slowly reduce the oxycodone and up the dose of olanzapine wafers to remain sedated. Continue to eat food and consume heavy alcohol in short bursts to fall back asleep. Make sure you are getting enough b1 in and more importantly b6! Hopefully after a week or two your mate is off the oxycodone completely and just consuming high voltage alcohol and olanapine to continue... then you will have potentially replaced the one habit with alcohol witch will be easier to overcome on a short course of benzos. B1 thiamin can be iv'd to replace the physical activity of boosting also witch is a bonus but it burns like all fuck and is very unpleasant to inject. My 2 cents. Sorry if its just retarded bullshit alchemica because I know you know what your on about. I'm just thinking replacing a hard habit to get over with a habit slightly less harder to get over. Plus cushy olanzapine witch really knocks you around short term so you can make big changes in little tine. Wish you and your mate all the best. Wert