Depends on who's playing. Every Apo has a cooldown after using a medkit, but players can heal as much as they want, whereas Nahum (one of the AI-controlled Terminators) has a limited amount of kits, depending on the difficulty setting, and replenished when entering a Psygate. Better use them efficiently!
Oh right i see, OK cool :-).
Sorry I have another question about the Apothecary .
I know the Apothecary has limited main weapons (Guns), i think 5 to be exact but can you still heal teammates if you don't have the medic power fist or what ever it's called?
I noticed you could have a normal Power Fist or even a Mace but can you still heal??
If you play Apo yourself, yes, because your skills depend on your class and not on your loadout.
When playing with bots, however, Nahum will be unable to heal anyone (meaning you won't have the heal option in the action wheel) if he doesn't have the Narthecium equipped.