I refrain from answering, in part because I'll start arguing rabidly on the subject (after ID's post, particularly at him), in part because I know there is no real sympathetic ear here for my take on the argument, and in part because that's not really what this topic was about, now was it?
It strikes me that this topic is not much more than a cry for help, or at least a cry for commiserating, especially after CSH's post about his heroin use. But here's where I run into a roadblock: Why here? Do you want us to help? To tell you something? I'm not sure that we can; heroin/pain killers is terrible, but telling you to stop is more useless than trying to read Meeple's posts in the Games topic. If you've already been to detox several times, and I presume to rehab at least once (by the fact that you've been in and out of jail, at least), so there's not much anything we could say will do. If all you were doing was looking for commiseration, I don't think you're going to find that here. If this is just something you needed to get off your chest, and tell someone... well, I question your choice of audience, especially for something like this, but that's fine.
You should try to do something--not all drugs are the demonic ruin-your-life substances first-world drug education wants to make you believe they are, but opiates, amphetamines, and the like might as well be. As useless as it is to say, you should really try to get out of the game. It wouldn't be easy, but if it were, then these drugs wouldn't be the problem they are.
I'll just stop there before I get preachy. I do want you to get help, but reiterating that fact more than I already have is the least helpful thing any one of us could do.