Shift Work Sleep Disorde
"I&#039;ve taken Provigil in the past for over 8  years due to severe IBDH &amp; shift sleep disorder.  When Nuvigil came out on market, my neurologist gave me samples to try.   I found it AMAZING &amp; much cleaner version, as I don&#039;t notice significant side effects.  Most importantly - the abrupt feelings when it first &quot;kicked in&quot; in the mornings and sudden halt from wide awake to severe sleepiness. Less agitated and very clean even transition from its predecessor Provigil!"