My 13 year old is on Vyvanse currently, and has been for the last three months or so. It seemed to work great for a couple of weeks, and my son likes it, but I don't see that it's helping him anymore. We went to an IEP meeting with my son last week, and I could really see from the teacher's perspective what my son is like when meds aren't working -- he just could not pay attention at all in this meeting. There were only six adults and my son, in this meeting -- so I can only imagine how much harder it is for him to pay attention in a big classroom with 25+ students and a lot more distractions.
I'm reading about others who have taken Vyvanse only to have it lose effectiveness relatively quickly, so I wanted to check this forum and see what other's experiences were.