I would find a new doctor, and have him evaluated. These symptoms that you stated "constantly hits hi brother when mad and throws tantrums when tld no that he can not do something." are not enough to get an ADHD diagnosis. These behaviors can come out of an ADHD child, but those are not symptoms of ADHD. I'm assuming there is a lot more going on then that though, and regardless of what is going on, when a parent is concerned a doctor should listen.
While some children do seem to outgrow ADHD, the evidence is becoming fairly strong that it's probably not outgrown, but changes enough to look as though as it has, or enough that the person can deal with it. Most people do not outgrow it though. I can't remember the exact percentage, but I'm thinking it's as many as 80% (maybe it was 60%) of adults with ADHD will still need treatment for it as adults.
My personal "opinion" is that it's never outgrown. I think the thought that it was outgrown came from seeing hyperactive boys begin to settle down. I wonder how many of those as adults still struggled from all the other issues though. I think some may have been misdiagnosis as well. With the high genetic link of ADHD, and the increase of adults being diagnosed, I just find it hard to believe that it's something that can be outgrown. I think it's a lifetime disorder that changes in it's symptoms as the person grows. Again that's just my opinion though, not based on evidence
Anyway, definitely find a new doctor to take him too. Parents typically know when something is just not right. Good luck!
Sounds like me when i was younger. I outgrew it around when i was 7, butJann
I too thought my son would grow out of his many "negative" behaviors, but he never did. He was diagnosed at age 9 with ADHD--now almost 12 we have tried many things to help him, from prescribed meds
to herbal and vitamin supplements (which we are successfully doing now). The hitting and tantrums you describe are all to familiar to me--and with my son, are due to very poor impulse control. He is doing so much better now--I homeschool him, he takes supplements, and we have had to get much stricter with him when he hits his sister or brother--we usually take away the computer or playstation. It is hard to get the medical professionals to listen to you; when my son was two I went to his Doctor to get help and all he did to help was to recommend parenting classes. Trust your instincts and see someone else if need be that will listen to your concerns. For now, there are great supplements that you can do on your own that may help your son--check out the Alternative Forum for advice. I found that a good Omega supplement helped alot.
Good Luck, Rebekah
Sounds familiar. My ADHD son has gotten so much better with this over the last 2 years. He's 7 now. I have to be really strict and consistent. I also give him Omega-3 for mood, and he takes a homeopathy remedy which is helping with impulse control.