I know people who cook their own medicine, but they are trained as chemists or microbiologists and have access to lab facilities. If Joe Sixpack stated doing his own, it'd look like so: https://www.nytimes.com/2024/12/26/world/americas/mexican-ca...
We know that niche stuff like Daraprim or trientine is easy to produce because it used to be cheap before the financializers got there. I'm not yet convinced that the solution is to cook your own, one should lean on the government to have a national facility.