I was on it for a month with the same problem. It made me tired. Then she switched me to provigil... which gave me a jolt of energy followed by fatigueand needing a nap. But it also made my heart pound and gave my body tremors so I stopped taking it and decided to just try to deal with the fatigue which means a long nap most afternoons.

Hoping it kicks inand works for you. Wishing you luck.