I currently take Levothyroxine 88mcg(μg) in the morning and 2 doses of
Adderall (instant release, not XR) 20mg - one in the morning before classes
and the second one whenever I need it depending on my classes that day or things I need to work on. I also later added Celexa 20mg which helped a lot with the anxiety and mood swings - especially from the "crash" of the Adderall.
But with ADD meds, no one can tell you what will work best for you, or what dosage, before you try it.