What Happens to Chronic Drug Users?

So imagine that there's a chain of neural events that occurs just before you get the hit from the drug. And then imagine that what happens is that the dopamen makes those circuits grow in proportion to how close they are temporarly to the drug experience. Every time you hit it with the drug, that grows and grows and grows, and as it grows, it learns how to inhibit all the rest of you. So now you're all screwed up on metham feta men, so someone throws you in a rehab center, and you go through withdrawal. That thing hasn't gone away. That's the monkey on your back. It's not on your back, it's in your