Body's natural pain killers can be enhanced. A study in cells and mice finds a opioid-receptor modifying compound works to relieve pain using the body's own pain-killers, with fewer side effects than opioids. Source 6o.
That would be great to get people off of commercial drugs but at the same time they may get addicted to this concept and want the body to do more with numbing the pain. But pain is necessary to tell us something is not right.