Looking for answers

How common is it to have downsydrome and have adhd? My son is never able to sit still and do one active long than five mins, he only sleeps about a hour at atime and is always waking up through the nite. Hes is ver smart and is only really delayed in his social skills. I hopeeing that someone has had this expenice or cn point me in the right dirction,

[portuguese mom]

You might post also in the down syndrom (syndrome) forum. Good Luck.