The Adrenaline Syringe is an item that fills the players boost bar. It takes 8 seconds to consume and fills the boost bar. Filling the boost bar will grant you regeneration of health and faster running for a limited time. The boost duration will last around ~ 5 minutes with a total health regen around ~ 86% and + 6.2 movement speed increase. 
Adrenaline Syringe increases a character’s boost by 100 instantly which can make the player’s health slowly increase above the 75. Performing certain actions while casting this item – for example moving, riding in a vehicle (only in bumpy roads not smooth roads), shooting or getting shot- will cancel it.
- Back in Alpha – Closed Beta, when you full ‘boosted’ with painkillers, energy drinks or adrenaline syringe. It granted you better weapon accuracy in one of the bars. This was later on removed when the game was released in Steam Early Access for unbalanced purposes.