The inability to sleep in "Stalker 2: Heart of Chernobyl" is a very troublesome special state in the game. This may be because you are in a state of hunger, bleeding or radiation, and you want to solve the problem of being unable to sleep. It can be solved according to the corresponding status.
What should I do if I can’t sleep in STALKER 2: Heart of Chernobyl
If you find yourself unable to sleep, it may be because you are starving, bleeding, or irradiated. The solution is simply to use a variety of detailed treatments to eliminate these effects.
Eat when you are hungry, sausage (medium reduction), bread (medium reduction), canned food (strong reduction), condensed milk (maximum reduction)
If bleeding occurs, use a bandage (maximum reduction), first aid kit (medium reduction), scientific first aid kit (medium reduction), military first aid kit (strong reduction)
For radiation, use anti-radiation drugs (maximum reduction), scientific first aid kit (strong reduction), Cossack vodka (strong reduction), beer (weak reduction)