You can picture it: The world has gone to shit (again), supply chains have crumbled (again), zombies and mean people are everywhere (per usual). Someone had an oopsie and needed something stronger than a band-aid. So the hero(ine) goes out in search of pharmaceuticals, shotgun, backpack, and sacrificial extra in tow.
They arrive at some pharmacy, grocery store, vet clinic, whatever, and rummage through scattered pill bottles on the shelves. Twenty seconds later they magically find piles of the exact things they needed, usually some painkiller or antibiotic. Examples: World War Z, Walking Dead, The Mist. (See also: No Healthcare in the Apocalypse - TV Tropes and Disaster Scavengers - TV Tropes)
How realistic is this? Even in these slightly pre-apocalyptic times, in well-stocked grocery stores with clear aisles and labels, I have trouble finding something as common as ibuprofen. And whenever I pick up prescription medication, I look behind the counter and think to myself, I have no idea what any of those drugs do or how they’re organized. I also have no idea whether similar-sounding drugs are close enough – methamphetamine is the same as dextroamphetamine, right?
So, does regular ol’ Postapocalyptic Joe stand a chance at finding the right medications for any given (non-exotic) injury or disease? Presumably Wikipedia is offline and he probably doesn’t have a pharma degree. But hey, maybe he’s learned a thing or two from other survivors (but then presumably all the common drugs would’ve been looted or hoarded already, no?).
What are the chances an average person can actually find the correct medications (and dosages?) to treat likely zombie bites, gunshot wounds, runaway STIs, whatever happens after 2025?