Aggression is generally higher in children with ADHD than those without. From your post I am not certain whether your son's anger is more dominant in the afternoons or is consistent throughout the day? If it flares in the afternoons this can be explained by the Ritalin wearing off; even though he is on the long acting Ritalin, the effects only last between 6 and 8 hours. Concerta is effective for between 8 and 10 hours while Strattera is a 24 hour treatment. I am very pleased to hear that you are still seeing the neurologist every 6 months; perhaps it would be beneficial to discuss the option of changing to Strattera with her/him as s/he will have your son's full medical history. If his aggression is consistent throughout the day, or is completely erratic regardless of time of day, it can be treated with medication or, in a less invasive way (and probably fewer side effects) with Behavioural Therapy.
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