In the most newest version (0.6-420-g501cc69) the bandages and first aids are really bugged.
Every time I use a bandage or first aid it either doesn’t disappear from my inventory or sometimes it even duplicates itself. So for example when I start with 1 bandage and I use one, I end up having 2 or more bandages… This happens with any bandage or first aid, the ones you find and the ones you craft.
Would be really nice to get this bug fixed as soon as possible as it makes the game much too easy as I can just have only one First Aid with me all the time healing me to full health. (I’ve uninstalled, updated, reinstalled the game several times and played with several characters, I still have the bug)