https://phys.org/news/2018-01-nonaddictive-opioid-painkiller-side-effects.html
This thoroughly convinces me it is just a question of when, not if, we finally get the first ever good effective non-addictive painkiller with few side effects. As I know from bitter experience (both personal and from seeing other people suffering) ALL the current non-addictive so-called painkillers are mainly placebo in there effect and pretty much useless for people who are in serious pain. We simply and currently haven't got a single acceptable painkiller for prolonged pain.
The earlier link I posted in another thread on the closely related subject was;
https://medicalxpress.com/news/2017-10-pre-clinical-path-non-addictive-painkillers.html