OTC.
Ibuprofen,aspirin,acetaminophen,benadryl,a few antihistamines(claritin ect),Pseudoephedrine,antibiotic creams,alcohol,iodine,peroxide,daily vitamins(mens,womens,and childrens),imodium(it is the only over the counter tummy medicine that is actually doctor approved for most travelers diarea ie bacteria in the water),decongestant,cold meds,Vitamin C(large stock as it can be used for things like canning potatos),hydrocortizone cream,lamisil AT(good for athletsfoot,but more important if you have children it kills ring worm,a fungal infection...yes first hand experince and the doctor recomended it...gone in 3 days or so).
There are a few I am probably not listing that we have. We check these for expiration and pull out things we use and replace with the fresh from the store stuff.Some things last 5 years or more others like creams and such less than 2 years.
First aid.
I do not have time to list everything lol. I will say with the 1500 next weekend stop and see "Mr Medic". He has all the glass ware lab type stuff. He also has some things you can not get any where else. An example would be a cauterizer(small pen with a tip that hits 2k degreese in about 2 seconds for sealing a wound,starting a fire,ect..).They are around 10 dollars I think,it was a few years ago when I got mine.He also has some disolving suture kits for 2 dollars each or so.Get things you for your kit you hope you never need.
Home brew
Fennel (anti flea they hate it?),spearamint,honey,aloe,parsley(mash fresh leaves for bug bites).
For trauma see first aid
I would die with out my q-tips lol.