The bottle of Calpol (and also Childrens Nurofen) both state 'up to age 9' on the bottle, but the parcetemol and ibuprofen tablets are from age 12 upwards.
Am I missing something here? 
I am finding that during current coughs and colds, when my DS1 temp flies up, it needs at least 10ml doses to bring it down, and it really does not last more than 3 hours.