I am wondering this same thing. I never slept well, being tired during the day and really awake at night. I have been taking Strattera for 6 days now (just upped from 18 -> 25mg yesterday) and I seem drowsy and heavily yawn during the day.
i found that taking stattera around 2 pm, every 24 hrs, seems to work for me. that way i am not tired during the morning, i sleep at night and it helps through the "down time" of the day. Dani T
I have also found that the afternoon is the ideal time to take Straterra. I began by taking it in the morning, but found that by the evening I was, while not incredibly so, more fatigued than I had been previously.
If I take it 8-10 hours before I am ready to sleep, it is ideal.
I take strattera in the morning as soon a i wake up i have been taking it for roughly 2 months. You may seem very tired during the day at first, but as your body gets used to it the fatigue begins to ware off. I have always had trouble sleeping usually getting 4 hours a night and as long as I don't sleep during the day I can go strait to sleep. Good luck with the medicine!