I think it would be nice if meds were stackable like ammo etc, what i mean is not place two Salevas in the same slot, but rahter that you could combine two 200/400 Salewas into one full 400/400 Salewa for example. I mean it would not be unrealistic to just take some bandages and whatever out of one Salewa and put it in another. It would make inventory management with meds much easier as you could just combine all your used meds into one new one.
Just being able to combine the same kind of meds would already be great, but if you want to take this one step further you could even make it so that for example adding a bandage to a grizzly adds as many HP to the griizzly as it would usually take to stop a bleed.
Just an idea, but i think this would be a cool quality of life change.