If he doesn't get treatment in time - the amount of time depending on your followers endurance (except for RL-3, who can be on backup power supply for a whole day), he'll die. The amount of Stimpaks and morphine (MedX) that the player'll need for CPR depends on his medicine skill. Instead, he'll fall to the ground and must be reanimated by the player. Feature: A deadly wounded companion will not die immediately (on default CBO Menu setting).