Well since the can of worms was already opened I'll throw my opinion in. I think parents trying to medicate a child for ADHD is lazy. There is a reason your Dr. won't give it to you. Seeking out one who will sounds to me like a desperate attempt for a quick solution rather than doing your research and find an alternative solution.
Drifting from your question.......I know someone who has her 4 year old son on Ritalin b.c "he won't sleep 12 hours a night without it". No joke, those are her exact words. The boy clearly has a learning disabilty. He barely talks, I'm not making that up, he really doesn't talk and when he does it's toddler baby talk. She hounded her Dr repeatedly until he finally gave in and prescribed ritalin. Once she put him on it yeah he slept 12 hours a night, but he also walked around like he was in a trance and had night tremors and loss of appetite (the child is 4 and only weighs about 30 pounds), so she took him off it. He was off the meds for 4 weeks when she started complaining that he was "out of control" and again not sleeping the 12 hours. He's a boy! Boys are supposed to want to run around and play, he certainly isn't out of control, and heaven forbid he not go to bed at 7pm and sleep until it's convenient for you to get up!! I'd really like to turn her Dr in!!