I would say that with the Omicron variant you can do the 0.4mg/kg dosage (I know with Delta, they were advising the higher 0.6mg dosing). Also, and correct me if I'm wrong, I thought the frontline docs were advocating for HCQ with Omicron (not that IVM was useless, but that HCQ was a little more effective). I personally used IVM because that's what I had on hand.