Hey bro, welcome to a better way of life. You might be surprised by how many people in the fitness industry have experience with drug addiction. There are parts of this sport that are dark. You won't hear about it in the mainstream coverage, but it's out there. And there is a good reason, addiction isn't just about drug use. It's a way of being. It's looking for something outside of yourself to make you feel better. Addicts are obsessive and compulsive. It's easy to become obsessive about fitness and compulsive in our actions. Sure bodybuilding can be a safer outlet than heroin or meth, but unless you are happy with yourself, you aren't going to find happiness in the sport. Obsessive thinking and compulsive behaviour pervert things that can be good and turn them into self destructive activities. Lets get away from bodybuilding for just a minute. Video games can be fun, but if someone takes playing them to an extreme, they can easily miss out on a whole life outside of their games. Missed oppertunities, damaged relationships, ect.  Same with playing music, or working, or spending money....or bodybuilding. I guess the reason I'm saying all of this to you, is because you have to be really careful with this. If you don't have a balanced life outside of bodybuilding, there is a good chance that the sport could turn into something you didn't plan on. 

I can tell you about a good friend, who is an addict that took the same path you are now starting. A long time ago, he fell in love with the sport and got away from the drugs. The weights saved his life. Problem was, he didn't work on the issues he had with his personality, that made him decide that using opiates was a good idea to begin with. Eventually, he got injured in the gym, badly. Without the iron to save him, he quickly reverted back to his old self. He didn't know how to live life on life's terms. It was so sad to see. With years of training, he looked like a totally different man, but the second that he couldn't work out, he didn't know what to do with himself. He was lucky and after a couple of years of real struggle, he got clean. He got into a recovery program and gave up recreational drugs, all together. He eventually got back in the gym and continues to train today. But his life doesn't end with training. He is also an active member of society and gives back. He talks to addicts still suffering and goes to meetings. He has to in order to keep balance in all areas of his life. Before he got into recovery, he wanted to compete, but he never had the ability to hold his life together and take the steps he needed to, in order to get there. He tried a couple times, but never got far. After he got clean, he began training, and one year into recovery, he began dieting for what was his first show. He did very well. He has continued to do so.

Methadone is a nasty drug bro. You know it is. And usually, you have to go to a nasty clinic, 5-7 days a wk to get it. You don't have to use it. You don't have to use anything. If you feel you need something like that, there are better options, but remember it's a crutch and eventually, you need to get yourself free, if you want to be happy. It's not doing anything for you but keeping you down. 

BTW, that friend of mine. Its me. Some people might say Im a hypocrite for claiming to be in recovery while using AAS. I really don't give a fuck what they think. I'm honest with my sponsor about what I do in the sport and honest with myself and my higher power. A recovering addict/bodybuilder walks a very thin line between doing your best and being obsessive. I lean heavily on my recovery to get me through and only keep company with good people. 

I wish you the best of luck, bro.