Hi Jules,
I have heard of lots of kids on Tenex for impulsivity/aggression. I believe Intuniv is just long-acting tenex (as you probably know). Tenex (and sometimes clonidine) was what was commonly given before Intuniv came into the picture, which was relatively recently. I'm surprised your psychiatrist doesn't know about the use of Tenex in this context. Is your psychiatrist new?
i don't usually stick my neck out about medications, but I'm pretty sure about this one.
Jo