@ClaytonWest What are you trying to come off? I've done that rodeo a few times and it works wonders BUT you need to be extremely careful. The two main concerns are your liver and your heart. The pharmacokinetics are extremely complicated with it being such a complex molecule (meaning your liver works overtime with all those metabolites). And the other concern is your heart as ibogaine acts as a hERG blocker meaning it blocks potassium channels which power the heart. The usual protocol for providers is to have the patient get a standard liver panel and an EKG. With the liver panel it just confirms everything is functioning correctly and with the EKG they are just checking that your QT intervals are within range. If the QT is in range and no other cardiac issues are known it's safe to assume the patient can tolerate decent amounts without the heart slowing to a stop.
WHATEVER you do just be sure to not take other substances within a week of taking the ibogaine. The exceptions are cannabis goes great with ibogaine, and sometimes a small amount of diazepam can help ease the tension. Stimulants, psych meds, even caffeine and some supplements are highly contraindicated. As far as the opioids DO NOT have fent or zines within like a month of dosing or more. Preferably patients are weaned to around 30-60mg morphine a day before they are given a dose. Morphine is the gold standard for that too, hydrocodone can work but be careful of the acetaminophen, technically codeine would be ok but it's too weak, oxycodone is too strong mechanistically (lowering dose doesn't compensate for it's added effects on beta arrestin 2) and same goes for pretty much all the other opiates as their binding strengths for mu tend to be higher than morphine.
For dosing you should DEFINITELY use the step dosing method. I did a flood (over 12mg/kg, may have been closer to 20mg/kg) in 2015 that almost killed me, left me unable to speak for days, and still in withdrawal. I was in full detox the morning of the dose and they started with a "test dose" which was 1mg/kg or less. That test dose took me from sweating and unable to lay still to completely calm and with minimal pain comparatively. A few months after my "treatment" someone died at that clinic (snuck stuff in and was still using when dosed) and they had to change the name.
For years after I wondered why they didn't just give me a low dose for ~5 days to get me through the detox instead of overdosing me all at once in that fragile state. Finally I found someone who pioneered that protocol. She was one of the original test subjects in that first trial after Lotsoff brought it to the attention of researchers. The person who went before her and after her died, which inspired her to come up with safer protocols. The way she did it was she got me to wean on instant release morphine over a month to a safer dose like 30-60mg/day then you start working in 100mg ibogaine in the mornings (little over 1mg/kg if you weigh ~100kg). Every day it builds because the metabolites stay in your system for days/weeks, so take note of that and be careful. By day 3 even 15mg morphine should make you sick, then just stick with the ibo for a bit longer to take care of residual wd symptoms. Force yourself to eat and hydrate throughout, cannabis can help. Coconut water is high in pottassium so it's great to drink a bunch before dosing just in case (even w the herg blocking having more available should help).
Finally: the form of ibogaine can be important as well. Ibogaine hydrochloride is markedly different than total alkaloid mixture which has ~50% ibogaine and the rest are other alkaloids that help modulate the experience. Studies have shown TA is easier on the heart than HCl at equivalent doses (for example 1g TA compared to 500mg HCl) TA is also much easier on my stomach.

I wish you the very best on your journey. Please be safe and report back if you can!