I believe when a child this young is having behavior difficulties and has ADHD, that there needs to be an evaluation by a Child Psychiatrist - - in other words, a specialist.
Your son is young, and will need support and a good environment to thrive......has he started school yet? If so, what do his teachers say about how he behaves there?
You don't mention whether or not he is on medication, so I am assuming he is not - after an evaluation the Dr. can advise if it may help your son.
Also, parenting classes can be really helpful in dealing with a child who is challenging.
You need support and help - I hope you live in a City that offers a lot of services for young children ?? I can help find local resources if you are not sure where to begin. If you write back with your City/State of residence, I can do some research for you.
Oh, gosh, I really feel for you, I understand how exhausting a child like this can be!!!!
First off, since what you're doing isn't working (and it sounds like you've really tried) - then you need to try a different approach.
I would highly, highly recommend you finding a smart, board certified child psychiatrist to give your son a thorough evaluation. You may be correct that there are other mental health issues going on, and children are complex little creatures who need a specialist treating them.
Mood issues, and ADD and anxiety are on the spectrum of disorders very similar to bipolar, and treatment is basically the same, depending on the child's needs and symptoms.
The Balanced Mind is a fabulous resource for parents to learn how to parent their child and gives a lot of ideas and information about medications, whether the diagnosis is "mood disorder" or bipolar.
Treatment typically is: stabilize mood with a mood stabilizer medication such as Lamictal, depakote, tegretol etc.... Then, once mood is controlled, then deal with residual symptoms, such as anxiety, ADD etc...
Rages are difficult to see, handle and experience. Psychiatrists may try and treat those first, if they are extreme. Antipsychotics such as risperdal and seroquel target those types of behaviors very well.
I'd urge you to check out the Balanced Mind for support and helpful parenting strategies.
Personally my daughter has not tired either of these meds, but I do know others that have had success with them......That's the tricky part about medication - what works well for one, is a disaster for the next.
Not sure how old your son is, but I'd urge you to check out this organization for more info.
Yes, I have heard of amantadine, but not necessarily used to stabilize mood or rages.
Typically a mood stabilizer medication is needed for that - like Lamictal, lithium, tegretol, etc...
My daughter is on a mood stabilizer and an anti-psychotic med (seroquel). It is not unusual for a child to need both a mood stabilizer medication and an anti-psychotic med to even our their mood and get the rages under control.
Lamictal is typically most effective at a therapeutic range around 200mg to 250 mgs - what was your son's dose?