It does help in my experience. Less so than Dexamphetamine, but also feels like it's doing you less damage. I tried Ritalin, but got headaches. We can't get adderall in .au so I don't know about it first hand. The problem is you can't get Modafinil subsidised if you have ADHD, only if you have Narcolepsy, so while Dexamphetamine is probably doing long term damage, it costs me $20 a month where Modafinil is > $200.