Kratom ain't too bad in my experience with it. The full-spectrum alkaloid isolates I've tried have generally been the best preparation.
Not terribly strong for me, having been on pain meds of one kind or another (morphine/oxy combination currently)
Tolerance is a bitch.
I need to remind my doc about the research papers I gave him a while back to read up on low/ultra-low-dose naltrexone protocols to inhibit and reverse tolerance, to see if I can pursuade him to let me give it a shot. At least it wouldn't cost the NHS too much, seeing as how a typical dosage unit is 25-50mg, and dose ranges for this use range from a few hundred nanograms up to a couple of uG.
Reports from people that have tried it look impressive to say the least, one paper I read had someone taper off from 60-something mg hydromorphone per dose right down to really low levels, barely noticing if at all any W/D.
Not that I'm looking to lower my dose, as my knee and hip are still buggered up, but gaining more bang per buck would be a good thing, as the low oral BA morphine has more or less means I need to shoot or plug it to get sufficient effect.
Not to mention that it would give me some substrate to work with so I could get to trying out iBnTXa, that splice-variant selective MOR1 agonist.