Buy-pharma.md has most of the drugs you might need to stock up on (no prescription needed) for when access to medicine becomes more limited. Most things have a 1-2 year shelf life so this is not a long term answer to the problem of tyranny but it can buy you some time at least.

Ships from Mumbai and takes 20ish days to reach you so this won't help in an acute situation. Get enough for your family and some extra because realistically if a dear friend is sick and needs help it will be tough to say you don't have enough to share.