adrenalin

1. adrenaline
   Posle skoka nivo adrenalina mu je bio visok. — After the jump his adrenaline level was high.
2. adrenaline; thrill; rush
   Voli brzu vožnju zbog adrenalina. — He loves driving fast for the adrenaline rush.
   Treba mi malo adrenalina u životu. — I need a bit of excitement in my life.

The derived adjective adrenalinski is common: adrenalinski sportovi 'extreme sports'.