https://www.americanthinker.com/articles/2020/05/hydroxychloroquine_me_and_the_great_divide.html
I took hydroxychloroquine for two years. A long time ago as a visiting cancer surgeon in Asia, in Thailand, Nepal, India, and Bangladesh. From 1987 to 1990. Malaria is rife there. I took it for prophylaxis, 400 milligrams once a week for two years. Never had any trouble. It was inexpensive and effective. I started it two weeks before and was supposed to continue it through my stay and four weeks after returning. But I stopped it after two years. I was worried about potential side effects of which there are many, as with all drugs right down to Tylenol and aspirin. These, however, are rare. At a certain point, I was prepared to take my chances with mosquitoes and plasmodium, and so I stopped.
Chloroquine, the precursor of HCQ, was invented by Bayer in 1934. Hydroxychloroquine was developed during World War II as a safer, synthetic alternative and approved for medical use in the U.S. in 1955. The World Health Organization considers it an essential medicine, among the safest and most effective medicines, a staple of any healthcare system. In 2017, US doctors prescribed it 5 million times, the 128th most commonly prescribed drug in the country. There have been hundreds of millions of prescriptions worldwide since its inception. It is one of the cheapest and best drugs in the world and has saved millions of lives. Doctors also prescribe it for Lupus and Rheumatoid arthritis patients who may consume it for their lifetimes with few or no ill effects.