I know from a purely pharmocological perspective, you can give panadol and nurofen at the same time as they are different types of drugs and act in different ways.

From a purely feeling based perspective, though, I too would be hesitant about doing this unless my DS was very unhappy- something about giving two lots of drugs freaks me out even though I know technically its ok!

There is something you can't give at the same time as one of these....um, codeine or something? Can someone smart come and tell us?