Hi - My name is Fran. I am an adult with Inattentive ADHD, OCD, etc. I have been on dexedrine, addrell, and now my doctor put me on Vyvanse. The reason your insurance doesn't want to pay for it, because since it is generic, it must be expense. I find that it is smoother, and it lasts about eight hours. I am on 70 mgs o