"i&#039;m a 20 year old female who started taking vyvanse about a year ago. i take two 70s every morning and i still end up feeling exhausted around 9 every night. i&#039;m pretty sure i&#039;m heavily bipolar though and that my family isn&#039;t listening to me causing me to frankly, lose my mind. i end up skipping a lot of pills and that seems to help. those days i feel comfortably idle."