It's the most highly addictive in the world. Outdoing smoking, heroine, cocaine, meth, you name it. It's more than a rush because it ravages his own blood to accomindate for his depth of evil. It's addictive to the body and the brain. There's no other drug like it. To put it another way, if one were to consume the amount it takes to reach that level of rush, one would die almost instantly from any of those other narcotics and one would have to consume inhuman amounts of those drugs to achieve what adenachrome does. This is one nasty thing that doesn't kill you like the others will, but once consumed, there is no escape from its hold.