"i have major depressive disorder. i have suffered very low energy since i was 12 due to depression. sleeping or laying in bed for 16 hours was normal for me. i was on 200mg each morning in combination with anti-depressants and a sleeping pill at night. i noticed no side effects from modafinil. i am no longer on this medication because it did not help with my depression, just helped with a symptom of my depression. (low energy). i was put on an maio anti-depressant and therefore could not continue with this medication due to interactions. but it did give me energy."