Stable dose regimen and hypnotic effects

I'd like to ask something from everyone who has used a stable opioid regimen for a long time without chasing the high.

I have no tolerance and after having experimented with different poppy tea doses I have noticed the hypnotic effect I'm after doesn't really depend on the dose. Whether 5g or 40g it's pretty much the same, only the buzz and next day nausea increases.

I always dose before bedtime, it helps reduce the anxiety and calms me down so I can sleep. I don't nod and actually I find it to take at least the same time as any other day to fall asleep, but it doesn't stress me out. Also even 5g doses have a noticeable anxiolytic effect for the whole day after. Especially after adding centella asiatica and voacanga/iboga to the stack, I think low doses are enough to reach the level I want.

So when on a stable dose regimen, do these effects diminish? After taking the same dose for moths or years, do you notice any effect at all? Even a calming one? I don't think I'm gonna start drinking PT everyday, but this subject has interested me a lot lately.