Alyson,
I know. I was surprised the insurance company could make that decision, but our doctor said it happens all the time. DS6 is doing quite well on 10 mg Vyvanse. I'm sure at some point we'll have to increase his dose, but this is working well for now. On 20 mg we noticed a decreased appetite but not severely so. With the 10 mg, there's no change in appetite at all. We are very pleased. Maybe the insurance issue was a blessing in disguise! Thanks for your response!