Well, and not just the cognitive enhancement with absence of actual ADHD. I've worked with cases of ADHD and I agree they can be very rewarding and often times, they don't come in on their own initiative nor do they seem all that crazy about their stimulants. The cases of ADHD I've had were primarily very responsible with their stimulants and at reasonable doses. However, those who don't have ADHD seem to more easily fall down that slippery slope. They take stim, perceive only a little if any benefit (no surprise, it's because they don't have ADHD, how earth shattering is that?!), they conclude they must need more, they get someone to prescribe them more, they continue to escalate the high daily dosage and next thing you know, they build up a tolerance and physiologic dependence to a point where they are even less functional on days without the stimulant than they ever were (entrenching their conclusion that they must have ADHD because look at how bad things are without the stim!). Not only that, it derails the patient from pursuing what is the actual underlying issue (e.g. sleep hygiene, substance use, other comorbid psychiatric disorders--both Axis I and II, better habits and routines even). I've heard a lot of people calling and trying to get into my clinic urgently because they are on 90mg Adderall a day, their last prescriber fired them because they still kept missing appointments, and they know they will be out of Adderall in less than two weeks and know the amphetamine crash is coming. Really unfortunate.