You sound exhausted and frustrated.
His behaviour getting worse at 18:00 may indicate that he is getting tired, however, I can only imagine the struggle you will face trying to get him to bed earlier.
For ADHD to be diagnosed, his symptoms must occur consistently for at least 6 months in a variety of situations.
ADDvance is unlikely to have much of an impact in his aggressiveness: this pattern of behaviour has worked for him for quite some time now and he needs to learn a new behaviour that will work better.
Depending on the area you are in, there are workshops that will be able to assist you to achieve this.
Please contact me via Email should you need more information.
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