Rank 1 improves it to 40%, rank 2 to 60%, rank 3 to 80% and rank 4 to 100%. Each rank of the Medic perk enhances the efficiency of both stimpaks and RadAway.Curie will occasionally give stimpaks upon initiating dialogue after unlocking her as a companion.Can be bought from almost any ' doctor' in the Commonwealth.Can be crafted at the chemistry station.Can be bought from Trashcan Carla, a traveling merchant.Can be bought from Trudy, the owner of Drumlin Diner.Can sometimes be found on the bodies of raiders and Gunners.
What makes these ones unique is that they will automatically be favorited immediately when picked up.