How long does adrenaline last in the system? I had stridor 7 hours ago and rushed to hospital as I cannot have salbutamol. I had adrenaline IM and also nebulised. 7 Hours later my heart rate is still sitting at 120 at rest and I have tingling in my fingers and hands, waves on pain in my left chest (that I had at hospital nothing showed on ecg), and short of breath. Should I be worried????