Colloquially acetaminophen/paracetamol and ibuprofen are "painkillers" but this is in a different class, it's amazing to have something which performs like the opioid pain relief but without at least some of the side effects. It's the first non opioid painkiller applicable for situations like post operative use. I'd have loved this after my hernia op, the last thing you need with that is opioid induced constipation.
I also thought about epidural. Is that a non addictive way to give pain relief (extreme yes)
Meanwhile my understanding of Non-Steroidal Anti-Inflammatory Drugs (NSAIDS) was that they were exactly that by definition - Anti-Inflammatories with pain being reduced by reducing the immediate cause of it, inflammation, not by interfering with the actual mechanisms of pain.
I guess one could consider general anaesthesia (laughing gas, ether, and more modern successors) to be "painkillers" too but they're obviously not quite the same category of thing.
Anyway, I enjoyed the article - it would be interesting to hear the author give their own reasons for not accounting for NSAIDs.