I can not give you a definitive answer on this, but the chances are very slim that adderal would effect alcohol level on that test. The best thing you can do is research the bac..that will give you the answer about what does and what does not effect that level.
A BAC calculator: http://www.ou.edu/oupd/bac.htm
If you scroll to the bottom, it'll give you an "at a glance" for both male & female.
I wonder if you are mistaken. He could easily have had a .06 level after a couple of beers. But not a .6-- He'd be pretty much unconscious.
You are right on bac .6
I'm sure she meant .06 ;-D