I’m sure someone on this long thread mentions that the FDA has banned the use for prevention. It will be prescribed by good doctors if you have symptoms, and is much more effective in the early stages.
The reason for the FDA rule may be that without the rule people will buy it and/or even hoard it, either for future use or for selling it, thus preventing those who are actually ill from being able to obtain it cheaply.
Understood that it is not a prevention med but instead a treatment med
there are over 15 studies currently hcl for prevention unfortunately results not expected for months..