How affective is Adderall XR, 40 mg q a.m. in divided doses? My 8 year old daughter has been diagnosed with ADD.  She does not have the hyperactivity component but does have an extreme problem with inattentativeness, not focusing or concentrating, not retaining info, anger agression, and forgetfullness. She has been maintained on Adderall XR, 30 mg q a.m. until recently when she seems not to affect as many positive affects with this dosage. Her physician increased her dose this a.m. to 40 mg q a.m.  I have the option of giving this to her in two divided doses, 20 mg initially and then 20-30 mins later, 20 more mg.  I gave this to her the first time this a.m. about 20-30 mins after she had eaten breakfast.  How affective do you think this regimen will be on her so far as affecting her concentration?Will the breakfast she consumed 20 mins or so prior to the dosage adversely affect the Adderall dosage?  In otherwords, will it minimize its affects. I need for her to concentrate and focus.  
Thanks for all your help.

Summarized question: What is the affect of taking Adderall XR 40mg in divided doses?