Stimpak (Fallout Shelter)
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- Stimpaks can be used directly on dwellers inside your Vault to increase their health and happiness as a result.
- Stimpaks can also be issued to dwellers out exploring, allowing them to heal themselves and explore for longer. A dweller going into the wasteland can hold a maximum of 25 stimpaks, and tapping the stimpack icon when sending them will outfit them with that amount.