I noticed that after a year on 54mg of Vyvanse my concentration levels have now dropped considerably, weight gain is up as is bloating/wind, leg tremors, blurred vision (at night), I feel like my stomach is solid yet my motions are regular, I'm now quite emotional, anxious and seriously quick to temper (although that has been true for most of my life this without warning). I used to take Concerta xl and found that too seemed to stop working (albeit without these side effects).
I wonder if maybe I should have stayed with the Concert xl but perhaps increased the dosage?
I'm in UK and we don't really have the ADHD thing nailed down very well here... unlike in the USA