She was on adderall 15 xr and she said it was not lasting though all of her classes so her mg was bumped up to 20 xr now she said that it last though out the school day but its too strong and she feels emotionless. is there anything we can do to make the lower dose just last longer? or do you have any suggestions on how we can get the best benifits because since she started on adderall she has As and one or two Bs before she was making Cs and one or two Bs with occasional Ds and Fs.