I've been trying to get sorted on this front. We have various prescription medications, and obviously these aren't easy to stockpile. I've been renewing them all whenever I can, even if I'm not immediately out of them. With the ones that some in 28 pill packages, I've been taking the odd half a dose (since this is fine for me health-wise), so I'm not immediately going cold turkey if there's a disruption.
We're well covered in wound care: dressings of various sizes and types, plasters, tape, antiseptics - and I'm making a note to get butterfly stitches. (Ashamed to admit, but I used to self-harm, although haven't in years and years, so well accustomed to caring for wounds.) I'd be wary of using superglue under any normal circumstances, but do have that, too...
OTC painkillers: co-codamol, paracetamol, ibuprofen (with and without added codeine). I'm sure I've read that aspirin has some surprising uses, so might look into that, even though it's not normally a painkiller we use.
Lots of antihistamins, as I have allergies. I keep several types, as I've been adviced to take a combination if I ever accidetally eat something I'm allergic to. I also have extra ventolin inhalers and nasal sprays.
Husband has dental problems every now and again, so I've bought a temporary filling kit, anbesol and corsodyl just in case. Is clove oil actually useful?
Other than that: cold and flu remedies, hyrdocortison cream, diarrhea tablets, rehydration sachets, cystitis sachets, thrush cream.
DM is visiting from foreign parts soon, and I've ordered some boric acid ear drops (do they sell those OTC in the UK?) as I've had issues before where I've found them really helpful.
I keep feeling like I'm missing something...