>It's the first non opioid painkiller applicable for situations like post operative use.

Perhaps the first approved by FDA, I don't know. In many countries, metamizole is the first-line drug for postoperative pain.

(It should be noted that metamizole may very rarely cause agranulocytosis. It is suspected that the risk varies depending on the genetic makeup of the population, which would explain why it is banned in some countries but available OTC in others.)