There is a Dr. John Campbell in UK who has a few responses on YouTube. Here is a response to one of his links.
11 months ago
"Dr. Campbell, I'm an RN in a 2,200 bed hospital in the US. The Hcq issue has been odd from the beginning. It's a perfectly safe drug when used with common dose, using the same dosages you listed in the UK pharmacopedia. 200 mg to 400mg per day. I, myself had been previously on this dose years ago for scleroderma. I had no issues at all with it, even with my lung and heart issues. None. The HALFLIFE of Hcq is 22 DAYS. 22 DAYS! And that's with good liver and kidney. And it stays in your system for 3 MONTHS. I imagine possibly why long term doses can cause problems. The 800 +800+600 on the first day, then 400mg twice daily boggles the mind. They should be made to explain the reasons for their dosing in the studies. The potential prolonged qtc is common in many commonly used drugs, including the nausea med zofran, which we give all the time. And is DOSE RELATED. Just FYI, you would be surprised how many Drs here put themselves, their patients and their families on it here. That would be the 200 to 400mg daily. Hopefully you will get to the bottom of this. We are quite puzzled why it turned in to a political thing."
My sister lives in Mexico and the government promotes it's use. The pills, which I don't remember the size/volume cost less then $3. In the US, if they can be obtained, is $186 according to one report I got. The tube of zimectrin for animal use is around $10. I know several who have been using that inexpensive tube. One product from Canada actually has increments of 50# on the plunger.