Jensen's health is fixed at 100 points at Normal Difficulty. This can be increased up to 200 using Painkillers (25 points), Hypostims (50 points), and drinks. Anything over 100 is temporary and lost if you are injured. If Jensen's health is below 100, Hypostims and Painkillers first bring it to 100, then add their 25 or 50 points. Drinks do not bring health to 100 first: At Normal Difficulty, his health regenerates 4 points per second, after a delay (without further injury) of 6.5 seconds. Thus, it would take him 31 seconds to recover from 1 hitpoint to 100 HPs (6.5 + 99/4).