I agree with the answers pertaining to nutrition, and non-drug solutions, but to answer the OP's question...
I used to take Adderall - it did help me to feel more "present" and focused - this not only helped with the ADHD symptoms of distraction and scattered thinking, but it also helped with anxiety, because I wasn't constantly thinking and worrying about all the troublesome things that constantly tumbled through my mind.
A lot of people misunderstand what ADHD meds are - they aren't some sort of narcotic sedative or depressant, but just the opposite - very strong stimulants. The ADHD mind craves stimulation - that's why you're always distracted and thinking about soomething more exciting than the boring, day-to-day stuff you need to be paying attention to.
So ADHD meds, like Ritalin, Adderall, etc. serve to provide the proper stimulation so that your mind actually quiets down. They have just the opposite affect in people without ADHD, and are therefore used and abused like many other stimulants (amphetamines, cocaine, etc.) by people without ADHD. Generally, people with ADHD seldom experience any addiction problems with stimulant meds - usually having a harder time remembering to take their meds rather than taking too much. But because the general population might abuse them, they are classified as controlled substances - so immediately, the anti-medication folks call them "dangerous."
Of course, there can be side effects. Stimulants are bad for your heart. They can decrease your appetite and lead to weight loss. They can also cause sexual dysfunction. They are prescription drugs, though, so you should be seeing a doctor anyway, and report any bad effects immediately.
I have found that drinking energy drinks like Monster, Rockstar, etc., have enough caffeine and other stimulants to help me focus sometimes. These aren't really good for you either - so I don't overdo it - but they're good for a quick fix every now and then.
I have also taken a supplement called L-Tyrosine - it's an amino acid that helps to strengthen brain synapses as well as muscle tissue. It can be found in pill form, but it's also included in many protein powders and sports supplements - and strangely enough is listed as an ingredient in many energy drinks.
That's my experience - results may be different in other people. Check with a medical professional.