Someday I'm going be lying in a hospital bed waiting for my visit from a time traveler who's unconcerned about temporal hygiene.
He probably had a little bit of time travel psychosis left over from his jaunt through the Guardian of Forever.
There has to be some head canon out there, but I think this is one of two things. Either a cure-whatever-is-the-problem pill, like with nanobots that can do whatever is needed in the body (so she had more than the kidneys fixed, that was just what was on her chart). Or in his equipment he has a medical replicator that will generate from base materials any type of specific drug needed for the diagnosed problem.
Or it's a placebo and Bones was very convincing.
Tbf, they are probably the magic-bean "fix-all" pills, not only for kidneys:-).
"wait so you work all your life for a currency just to lose it all the moment anything goes wrong?"
these were standard issue before synthehol was regularly available on starships. can't have too many people asking about the abnormal kidney failure rate in starfleet or they'll start poking around and find our Saurian brandy stash
ST got the future of healthcare right: when the toolset is so advanced you can wave a thingy over a body part and perform diagnoses and repair on the spot, the profession becomes 99 per cent bedside manner.
Which is why Bones was shoved onto a ship bound for somewhere the fuck else.
gotta get a doctor in stat! this guy's liver got sliced clean in half!
