Consider having her (or you) see a therapist that has experience with children and adhd.  My son sees one and it helps both of us.  I see her separately to help with my own anxieties.

My 12 yr old son was on Kapvay of 9 months. First he gained alot of weight with it and a second he also had anger issues. Main late in the day when it was wearing off.  His therapist switched meds on him and he doing alot better with the anger issues.
Part of it might be hormanal because at this age everything is an issue to them.

I also have a 10 year old daughter with ADHD, and we are so far away from having the answers you are seeking. I have one suggestion that you will likely find helpful. I’ll give you our history, then you can go from there.

Our daughter has had a long history of fine motor delay which affects her printing, drawing, speech etc. She had pych-ed testing done during the summer after Grade 2 since her learning was variable. Had it one day, but not the next. At that time they explained that she had a Visual Integration Disorder, which was the cause of ADHD symptoms. They recommended Vision Therapy, so we added it into the mix of Speech Therapy, and the occasional Play Therapy for her frustrated behaviours at home.

Because she is delightful at school with a sunny disposition, her diagnosis has taken a long time. In May of this year she went in to a Children’s Hospital for a multidisciplinary evaluation complete with psychologist, psychiatrist, Occupational Therapist, Speech Therapist, and Teacher to clarify the diagnosis, and take advantage of a team of people to collaborate the findings. The testing process took 5 weeks to complete.

They recommended I read the book “The Explosive Child” by Ross Green. to help better understand why the explosive episodes are happening, and they felt following his approach would be a great help. Usually the pattern of explosions are quite predictable, and it usually revolves around a lagging skill set that needs to be developed. Because the upset is often highly predictable, you can then approach the problems, before they take place.

It has helped us understand the lagging skills behind her oppositional behaviour.(The cognitive testing supported this as well).Ross Greene dismisses the notion that kids are being manipulative, or bad etc. He says “kids do well if they can”, and would not choose this behaviour. He then describes the Collaborative Problem Solving approach to help you address your concerns once the situation has diffused.

To give you an example of skills, here are a few: difficulty handling transitions; poor sense of time; difficulty considering the likely outcomes or consequences of actions (impulsive); difficulty considering a range of solutions; difficulty expressing concerns, needs or thoughts in words; difficulty managing emotional response to frustration so as to think rationally; difficulty shifting from original idea, plan, or solution. The list goes on and on. It can be found on a website called “Lives in the Balance”. Let me know if you need help finding the list.

This is my first time on this site, so I hope I can find my way back to it. I’d be interested to know if any of this sounds familiar. We’re going through another set of issues in regards to transitioning back to school, that has us all tied up in knots.

Hope this helps.