We tend to feel in control when adrenaline is running through our system. We can deal with many things at once and we are able to make rapid decisions. You can work all night and perform acts of superhuman intellect and ability. And easy to see how someone gets addicted. The net effect of abusing your adrenal system is a direct increase in your cholesterol levels and a lowering of serotonin levels.
Cholesterol leads to heart disease and premature death.
Serotonin is your feel good drug. Low levels of serotonin have been linked to depression, anxiety, and in extreme cases, multiple personality disorders. The drugs Prozac and Zoloft are serotonin uptake inhibitors which cause serotonin to hang around in the brain rather than returning to its storage sites. This helps a person who is depressed to keep their feel good drug levels up and better cope with life. An obsession with thoughts about what remains undone.