look at that link for pediatrics. here it is, as an expectorant -
SSKI: 60-250 mg PO q6hr
thats by the mouth every 6 hours. four drops is only 120mg of iodide. i think twice that much three times a day would get you where youre wanting to go.
the child should be taking the 4 drops a day anyway at that age so a therapeutic dose is going to be of necessity much higher.
i hope my ramblings help. some people call what i say insane. all i know is this works in practice for me and others and its safe. its laughable, its so safe. and no one dare speak this. every popular supplement is low dose. everything on the shelves in the hfs is low dose. i could eat the whole bottle at once in most instances. the stuff on the alternative web sites is all low dose, except for jcrows.