I just started Vyvanse after years of Adderall, Only 1 week on Vynase 40 mg and I have a need to breathe deeper to catch my breath. First I had trouble falling to sleep but my dr told me to take it 2 hrs before I wake up. (lol in my sleep) no it just sounds funny I do wake up about 4am anyway so I just take it then and it seems to work. (wears off earlier) but I'm worried about my breathing