>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.)
From my limited experience of metamizole it feels a bit stronger than paracetamol/acetaminophen. Neat little drug if your genetics can take it.
Tangential: China technically banned metamizole due to the agranulocytosis scare, but somehow small clinics always have fresh stocks of this stuff. And their stocks don't look like my metamizole for horses! It's pressed out of the usual magnesium stearate instead of whatever rock-hard thing they use for animal drugs in China.
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.)