That depends on the meds. Trust me on this...
Yeah, that's true. Usually though we're talking about "controlled substances" that are limited that way. Xanax for example. Darvon and compounds containing it. Things like that.
I've not run into that problem with heart meds, thyroid, or basic BP.
It helps that I have a a couple of doctors that see the wisdom of being prepared and have confidence that I have enough sense not to harm myself.