Get him checked for cerebral allergies. THe common ones are milk(casein) and wheat(gluten) - sometimes, with food allergies there are no physical symptoms, instead they are behavioral. Also, get his levels of fatty acids checked and his histamine levels checked. Also see my post on theanine. I have also just learned that a combination of tyrosine and 5htp is as helpful as medication. God bless.
I would get him tested and this is what the Dr should have done. An ADHD child is impulsive and can hurt themselves, there mind runs at high speed and they act to fast to relize what can happen.
My son has nights that he don't sleep and he is on meds now, but its hard for us to stay awake with him, and I hope your a light sleeper.
My son went on ADHD meds and they also give him clonidine to calm him down, if they do use clonidine for your son give only what the Dr says it is a med that slows the heart down and to much can stop the heart. My son has calmed down some he is 6 and been on meds since he was 4. He now only takes the Clonidine at bedtime.
Take him to a specialist, there are many places that deal with that now. He can't help what he is doing, so try to be patient.
It is possible that its not ADHD, I know someone son that was dignosed but the meds didn't work and they tested him some more and he had Asberger Syndrome, this is a type of Autism, but I don't think they are as impulsive.
If you don't get him tested right away you may try to give him a dose of benedryl at bedtime, and sometimes coffee will work the opposite and calm them down I would try this when you can watch him.
My son still drinks a sippycup, for a long time he would ask for his milk and I think he done this to calm himself down.
You also need to check what he is eating, chocolate wires my son up but not sugar. I would keep him off different foods at different time, food dyes also can cause a problem. I read one time a lady said pizza affected her daughter. The MD can also check for food allergys.
Hang in there it can be a nightmare at times when you can't do anything for them.
God bless you and your son
Karen