I am also interested in this. I like that the execution of binaries is tied to the nix-store, but I am sure there are some things to be done to harden it further.

I second the 3 month supply trick -- sometimes referred to as a "travel amount". Sounds like OP is more deserving than most of that accommodation as they are actually traveling a significant distance to and from the pharmacy.

I know, right? To whomever is also working on the XKCD image showing the giant stack professional services and verticals that ADHD brains gravitate to supported by the pharmecy refill reminder and refill pipeline: you can stop. We're already down, no need to kick us.