Commet symptoms and conditions

My ADOPTED son almost 6 and was already on Singulair when he came to live with us at age 20mos.
After finding this site just over 2 weeks ago, I took him off on this stuff. Well, after about a week, things were so good that it was scary. His behavior improved so much, that everyone said he doesn't act like Jacob. I said, yes he does, we just didn't know him before going on this med.
He is currently going thru ADHD evaluation and I advised the therapist that I took him off this drug and he was like a new child. Her comment was "did we cure him"? Well, after her one on one with him, she commented, I don't know whats wrong, but he is extremely HYPER and then all hell broke loose on the way home. But, he has been fine since.
I am praying that I don't have to medicate him for ADHD, I am just not ready for that and have been fighting it for a while and then after reading all the side effects on this site, it described my child to a tee. He is in Kindergarten and is doing great academically and the therapist was a bit surprised by that with how hyer he is.
Please tell me with how long my son has been on this drug, that it's going take more than a couple of weeks. He is not near as hyper to us as he was before. Maybe he just got excited about all the toys in her office. He can also be very defiant, that is whole other issue we are dealing with. He does way better for his Dad than Me, so now if he doesn't want to listen to me, he Dad intervenes. I am hoping he will get it, that he can't be disrespectful to his Mom or he will have his Dad to deal with.
Thanks for listening and please pray that his behavior will continue to improve over the next few weeks with the absence of Singulair.