When it comes to medical supplies, some preppers store antibiotics, Band-Aids, Tylenol, maybe a bit of gauze and call it good. Perhaps a few more things, but not much because they’ve got a doctor in the group, or barring that, silver or barter goods and skills to be able to make arrangements with a doctor.
Unfortunately, that approach may not work out so well.
Realistically, how many supplies can a physician be expected to stockpile for a community? How many physicians are actually preppers who foresee a need? Post-disaster, it will be far easier to locate a physician who knows how to use supplies than it will be to locate the supplies themselves. While obtaining prescription medications in quantity is a challenge, fortunately many life-saving supplies and medications can be purchased right now, by anybody.