At this point in understanding exactly what dua is, it would be easy for someone from a Christian background to think that dua is prayer. Dua certainly holds certain similarities to the prayer of Christians, however it should not be confused with what Muslims call prayer.
No, Vyvanse is not yet available as a generic. Adderall, which is very similar to Vyvanse, is available as a generic. You may want to talk to your physician about whether it would be a good alternative for you if you are looking to save money on your medication.
Lots of people have been looking for safe and legal over the counter alternatives to Vyvanse and other ADHD prescription meds and the market is starting to product some quality natural supplements similar to Vyvanse and other meds such as Addtabz from Lexium International and Adderrx.