Took vyvanse (lisdexamfetamine) for the first time, about 40 mg. its not prescribed to me and i had a ua done. i had 11 days in between, should i be worried?

Be careful: I am not sure how long it takes Vyvanse (lisdexamfetamine) to leave your system. I am writing because taking,this drug without medical supervision is actually quite dangerous, more,than with other medications for attention problems such as Adderall or Ritalin. This medication requires monitoring and blood tests. See a doctor if you are having attentional problems - don't take someone else's meds