As someone married to a man with adult ADHD, I can say definitively: YES.
Aside from drugs, consider getting the books "Driven to Distraction" and "Answers to Distraction." They give some practical advice about coping, setting up your day to be better prepared, meditation and organization.
On top of that, he was prescribed Ritalin about a decade ago, and although he'd resisted taking drugs for a long time, now he kicks himself and talks about what he might've been able to do if he'd known these things when he was younger. As a writer and editor at Fortune magazine for years, trying to "keep it together" just about gave him a nervous breakdown every deadline...so, pretty much constantly.
One fascinating thing about Ritalin is that if you're ADHD, it calms you down. If you're not, it hypes you up, which is a good way to tell if you're a good candidate for it or not.
I can tell immediately if he hasn't taken it. He can be positively manic, unfocused, more aggressive, particularly in things like driving, which is typical ADHD behavior. I refuse to drive with him if he hasn't had his Ritalin- risk taking is one of the markers, and although he hasn't had an accident in years, it scares the bejabbers out of anyone else in the vicinity.
Hope that helps!