Imiprimine was very interestomh with me. Remember, this is just ME and how it affected me. It was the second antidepressant I ever took.
It took the normal six weeks to kick in, but, when it did, it kicked in hard and fast and strong. I was maybe slightly hypo-manic, but I felt great and thought, "I have an answer." Also, it didn't increase my appetite. Now I have to tell you, I am as spacey as all get-out and was back then too (I was in my late 20's) and no antidepressant ever helped my attention span. That included imiprimimine.
Six months after starting this medication (yes, a full six months later) I woke up one day and was hallucinating and having trouble swallowing, a serious side affect I had also had to this drug's cousin, Amitriptylene. It was horrible timing as we were moving that day and I spent the entire morning in ER trying to fight the hallucinationis. It was too bad. I had felt happy for six months, but perhaps it had made me manic. I did NOT feel calm on it though. I felt wired and hyped up and a little high.
Remember that all people are different. I just wanted to give you the heads up that all antidepressants have the potential for the same yukko side effects and make sure you watch your kiddo carefully, especially as the months roll by. These medications don't really work right away (if they do, it could be a sign that it will make your child manic). It shouldn't help really quick. Then once it's in your system, there is a buildup and people like me suddenly get overdosed, even when all seemed well.
If you don't like Adderrall (and I sure didn't for my boy) I'd just ask to have it removed. Adderall's benefits/pitfalls was a no contest for our kid. He was way more hyper and mean and did not sleep much on it so we discontinued.
I wish ya lotsa luck 
