I know how that goes. I was wondering if I'd ever see another artist talking about the speed/creative bent. I can only give you my experience with what has and has not worked for me in the past. Like you, I'm ADD, took pills for 4 years for it as a kid, then was taken off. The addiction issue that first cropped up for me had been coke. This was in the 80's, and since I never got high smoking/shooting it, (tried didnt do much for me) there simply came a day when I couldn't get any up my nose. I waited a day, tried and felt way worse after having done it so a couple days later the shit feeling started to go, and that was the end of my coke use.
Next came crank which I did moderate to heavy use til one day all sources just disappeared or dried up. I had been extremely upset then proceeded to slip into my heavy Rx painkiller/blackout phase. I had been so upset at being cut off from speed that it felt preferable to be loaded out of my skull and I'd try to sleep as much as possible through life rather than face a day sober. I defo do NOT recommend going down that road. Another 4 years later and I got hooked up with speed connections again.
I went through the next 6 years of binging/stopping off and on, having a blast and alternately being fired, broke, homeless, hell as there was constant drama of feast or famine until the end of 2000 when I'd finally gotten pissed enough at myself for almost losing yet another job, hence the start of my 2 year phase of using on a schedule. I knew I could not have shit in the house during my abstainance periods that I chose to be 90-120 days. I also did not hang with others that were tweaking or let them come around me.
To help with the detox part I had either used ephedra 2 pills 3 times a day with excercise even though I didnt want to. I made myself go on 3 walks or swims every day for a week and by the end of the 2nd week, I felt almost normal even though I was jonesin. I used alot of the suggestions in the book "Sex, drugs, gambling, and chocolate" and found the scientific information useful. It worked well for me for 2 years because after 90-120 days clean I'd plan an unpaid 7 day time off, no driving, no work, no responibilities shoot a teener in 5 or 6 days with one or 2 days to recover.
It worked great until I got some dicks that wouldnt let me have the unpaid time off, which started me quickly back to daily habit and calling in sick, not showing up, or being way late. I found BL by then and took the suggestion of detoxing using Taurine, L-glutamine, L-tyrosinne, and I cant remember the name of the last one but I was told to take each one 3 or 4 times a day with exercise so kicking only sucked half as much. There's also a drug I read about called Viga something to help speed w/ds you can ask an MD to write for you.
The only other way that worked was being in jail 17 days and the first 10 days sucked, but by day 11 the w/ds had gone and I was able to stay clean off all drugs/booze for 2 years by going to NA. I m ade the mistake of taking Tramadol and that woke up the beast again.