Leftover medicine from before the apocalypse are still lying around everywhere. You can find them in piles of scraps, at some map locations, or try to make them yourself. In Judgment they are an item that Survivors can craft and use in further crafting, or in healing survivors at the infirmary.
- Using medicine directly to heal at the infirmary is the cheapest way to heal.
- Crafting first aid kits with it is more expansive, but they can be carried to the battlefield.
- You can craft medicine yourself, after unlocking the research & learning the skill for it.