My wife just had 2 wisdom teeth out, and before they let us go they gave her a drip of 250 ml salt water, then 100ml of theis ornidazole, then another 100ml salt water. Searching now, it looks like ornidazole is mostly for protozoans and amoebas and that, not so much a normal antibiotic. So what's up?
BTW, we're in China.