What is the difference between Adderall and Dextroamphetamine?

Adderall is a combination of four salts as a single entity amphetamine product. In layman's terms that means that they have taken four different parts and used different salts(i.e. sulfate, aspartate etc... ) to produce a more varied pharmacokinetic profile(longer time to peak blood concentration, half-life).
In parting , If your physician has prescribed you this particular medication then he or she has determined that it is the appropriate medication for you.
The difference between each medication is not as important as if the medication/treatment is working for you.
Lastly always do remember that if you have any very important or pressing issues with your medication you can always call any pharmacy and speak with a pharmacist if your regular physician is not immediately available and if it is an emergency always call 911 and I wish you the best.

The difference between the two really depends upon the individual, as it varies from person to person. Dextroamphetamine is proported to be a quicker acting, more centrally brain activating, but of shorter duration than the mixed salts of version (Adderall). Some people claim that l-amphetamine is less centrally brain activiating, and may increase blood pressure and heart rate more than Dextroamphetamine. I have tried both, and this may be the case, slightly for me. However, I do not find Dextroamphetamine more euphoric (if any at all) or more centrally activating within the brain than Adderall. However, people differ, and have very different, and even opposite reactions to each drug. You should try both out with your M.D. is he allows it. There has been a bad stigma, due to abuse by both of these drugs, and for some reason Dextroamphetamine has traditional had more of a bad rap (as being more addictive) than Adderall. So many doctors won't even prescribe Dextroamphetamine (brand name is Dexedrine). Both Dextroamphetamine, and the instant release generic version of Adderall come in time release capsules as well. The original manufacturer of Adderall still makes Adderall-XR (xtd release) and I believe Dextrostat is the brand name for the extended release version of Dextroamphetamine (brand name Dexedrine). I believe the Adderall-XR is expensive if you don't have insurance, because it is still protected by copyright and there are no current generics allowed on the market. There are also ADD/ADHD drugs, that are less Centrall and Peripherally acting like Ritalin (and it's generic) and the extended release version of Ritalin, called Concerta. These consists of a chemical that acts similar to, and is chemically related to the amphetamine group. Lastly, Vyvanse came out several years ago. It acts like a pro-hormone, in that it is not an amphetamine, but your body converts it through enzymes into an amphetamine. So it is less strong, and has less addictive potential. Plus it is sold only in time release version. Finally, there is brand name Methoxyn (Methamphetamine). Yes, Methamphetamine. However, there are no additives, or other ingredients mixed in like the street drugs. The Methyl- part that is added (thus "Meth"amphetamine) crosses the blood brain barrier easier than Dextroamphetamine and Levoamphetamine. I tried it long ago, and it did absolutely nothing for me though. It is very rarely prescribed due to Methamphetamine being all over the news.