Recent research into possible reasons for aggression have highlighted the impact of neurotransmitters on brain function. Take 10 minutes to view this mini-movie explaining how a lack of Central Nervous System stimulus can actually fuel aggression. Medications that sedate the nervous system may actually be triggering the aggressive behaviour under treatment.
The principal also fits with ADHD protocol administering Ritalin. The hyperactive and/or aggressive child is brought into line using what is actually a stimulating drug.