Saw a post yesterday with a link to an opinion piece about the dangerous side effects of the "H" med, so I clicked over...and scrolled straight down to the bottom of the article looking for footnotes, which took me to the source of the information being 'splained to me. Below is a dosage chart from the source article citing findings from a study that proved the drug had dangerous side effects. Look at the doses in that chart.
The #WhiteCoatSummit doctors recommend 200mg every two weeks as a preventative and twice a week for EARLY treatment - under doctor supervision.
The doses in the study citing dangerous side effects are toxic. Check out the 2nd photo. It's from an article written by Dr. Simone Gold on June 17th and it talks about toxic dosages. I'll put a link to Dr. Gold's article below. I understand that toxic levels have side effects.
Check out the 3rd and 4th photo: they are retracted clinical trial articles by The Lancet and the NEJM (New England Journal of Medicine) because the data in those studies could not be verified.

Source article showing findings of a study:
https://www.accessdata.fda.gov/drugsatfda_docs/nda/2020/OSE%20Review_Hydroxychloroquine-Cholorquine%20-%2019May2020_Redacted.pdf

Dr. Gold's June 17th article:
https://thegoldopinion.com/blog-1/f/the-politicization-of-hcq