I have been on Adderall XR for years, insurance decided to go generic. I was given Actavis/Teva it what the pharmacy told me the manufacture was. They are the same manufacture. I have never felt so horrible!!! The closest one I have found that is close to the brand name Adderall is Impax generics. I have some friends that say that Mydayis is just like the brand and lasts longer. I plan on seeing my doctor and changing.