The Auto-Inject Stimpak is a modified Stimpak which monitors vital signs, allowing for timely emergency treatment. It is used automatically from the player's inventory when their Hit Points drop below 50%.
- Can be crafted at any chemistry station.
- Each rank of the Medic perk enhances the efficiency of Auto-Inject Stimpak. Rank 1 improves it to 35%, Rank 2 to 40%, Rank 3 to 45% and Rank 4 to 50%. The Medicine bobblehead further increases the Auto-Inject Stimpak efficiency by an additionnal 5%.