My understanding is that Strattera actually stays in your system for like 5 hours but the effects of it remain for 24. I'm not sure why it takes a few weeks to feel the "full" effects but after 24 hours it is out of your system. I'm not surprised you felt your symptoms coming back after missing a pill.
I was on it for 5 weeks but had some nasty side effects. I stopped taking it after 5 weeks and within 2 days I had no effects from the Strattera at all.
I've been on Strattera for about three weeks now, and it's been going very well. Extremely well, actually. I'm planning on upping my dosage slightly when I meet with my doctor in a week (I'm currently just taking 25mg once a day). However, one thing confuses me... I thought Strattera was supposed to be like Prozac in that it builds up in your system, and one dose doesn't have a major effect in and of itself; it's the levels of it staying high in your system. I'm confused because I forgot my dose this morning -- and I've been my scatterbrained old self all day. I thought I could go home this afternoon and take the dose and be fine, which I still plan to do, but I didn't think I'd see such a recurrence of ADHD just from missing my morning dose. I haven't been able to accomplish a damn thing this morning. Maybe I'm just convincing myself of this?
Forgive me if I seem overly worried about this... I just have such huge hopes for Strattera that any problems with it get me really concerned.