Sorry guys, I wasn't very clear in my post. But yeah, I made the mistake of taking the Adderall late in the day. Needless to say, I haven't slept worth a damn. At least I'm off work tomorrow, gonna eat breakfast, smoke some green, and avoid stims for a few days, at the very least.
I was just worried that, because I take Valium, the d-methylphenidate might still be in my system, as they are metabolized from the same liver enzyme. Didn't know if that could cause problems taking another stim, in this case Adderall, an amphetamine.
Thanks guys. Used to take Adderall a lot when I was prescribed it 4-5 years ago. It's too much for me now, enjoy d-methylphenidate much more, I guess because it's milder.