You're right, it is confusing! My GP, for example, doesn't diagnose ADHD (at least in adults). She refers out to a specialist for that. Another GP I know will diagnose ADHD and prescribe non-stimulant medication to adults. But he says if they want stimulants, they need to go to a specialist. I wonder if this is related to some sort of cap they try to stay under for prescription of controlled substances?