From what I've been reading, it doesn't matter when you take it, you just build up a certain level of Strattera in your blood if you take it consistently. The first couple weeks I took it in morning. I would get heat flashes and heart palpitations in the morning. I switched to taking the meds right before bed, and have been ever since.
Just to refresh from some of my older posts, I'm 40 yr old male, taking Prozac and Lithium for Bipolar disorder for about 14 yrs. So, I can only take non-stimulant meds for AD/HD, otherwise other problems might surface. I also take Provigil for Narcolepsy and Mirapex for RLS.