Adderall is a prescription prescribed by your doctor. Personally, and this is only IMO I believe there are better alternatives such as non stimulant medication if it is deemed necessary by your doctor. I also believe in holistic approaches. You'd be surprised how much good a good night's sleep and exercise can do for your focus. Also, it may not be related to some form of ADD/ADHD.
Also, do NOT use this as a method of weight loss. I have seen a lot of people try this to lose weight as it suppresses your appetite. It does nothing but make you gain the weight back quickly in the long run and can also cause serious health issues (kidney failure, liver issues, heart issues) over time.
Oh -- and there are ALWAYS side effects to every drug. Some are more extreme than others. The doctor can go over all of this if they decide its right for you and let you know all of your options.
Hope that helps.