Thanks to all for your support and comments.

My son is coping well in terms of side effects but there has been little difference in his concentration and "staying power" (for want of a better expression) abilities.

I doubt we will continue with Straterra past the 3 month trial (which I am prepared to try).

I tend to feel he will benefit best from Methylphenidate 3 times daily (as Geordie's son takes) - I will talk to my doc about this soon.

Thanks to all for taking the time to respond to this thread!