This was my experience as well. After 6 months on adderall I had already shown signs of addiction (dosage was needing an increase in order to maintain its effec

This was my experience as well. After 6 months on adderall I had already shown signs of addiction (dosage was needing an increase in order to maintain its effectiveness). I have been on the same dosage of Vyvanse for 4 years now, without any problems.