Blood test kit, Morphines, and epi-pens, take up one by one inventory space. Imagining to have 25 morphine injectors, and how much they will fill up a taloon backpack, I assume it won't be much.

Many items ingame can already be stacked, for eg, stones, sticks, rags, ammo, etc. Please also allow these small medical items to be stacked, even at small numbers - 3 or 4 just like rags. It is quite unrealistic.