I don't know much about ADHD so wouldn't like to form an opinion about it or what to do about it. This is hyper-activity though? I wouldn't say Speed would be good for this, quite the reverse and as I mentioned the downer is not pleasant. I fully understand you taking him off it, and don't know why it was diagnosed.
I do know someone who has a kid of 15 now, with ADHD. I'll ask him next time we meet about this and if he's experienced this 'poor medication' choice. I know he has had many challenges in the past. My daughter fortunately has not experienced this.
RE: Drugs - My Experience with 'Speed'