Yes, and went to sleep shorty after my noon dose of 10mg dexamphetamine. ![Yawn :yawn:](http://www.intensitysquared.com/Smileys/default/Yawn.gif)
So they really aren't working for you at this point. ![Undecided :-\](http://www.intensitysquared.com/Smileys/default/undecided.gif)
Dexamphetamine is effective for sleepiness in much the same way that paracetamol is effective for pain; if I'm just a bit tired or have a mild headache, dexamphetamine or paracetamol will completely eliminate it for a few hours, but if I'm very tired or in a lot of pain, they'll only take the edge off of it at best.