Dextroamphetamine. Worked great for a few months, but have lessened in effectiveness. Now it still works for focus, but the impulsiveness came back (he was actually able to explain to me that he was having trouble controlling his actions), so he's now on guanfacine too, for impulse control.

We do a couple off days now and then, but not a lot because he feels like it's a wasted day because he can't focus on anything he really wants to. I suggested that he could take weekends off the stimulant, but he says he'd rather be able to operate mostly every day than to have a more focused week and completely wasted weekend, and I feel like he's capable of making that decision for himself.