From 11th Edition of Encyclopedia Britannica 1910-1911 (Brownstein 2006:8)
“In medicine, Iodine
is frequently applied externally … and in the treatment of many conditions usually classified as surgical. The usual doses of these Iodine
salts are from 300mg to 900mg. Their pharmacological action is obscure just as their effects in certain diseased condition are consistently brilliant and unexampled. Our ignorance of their mode of action is cloaked by the term deobstruent, which implies that they possess the power of driving out impurities from the blood and tissues. The following is a list of the principal condition in which iodides are recognised to be of definite value: metallic poisonings, as by lead and mercury, asthma, aneurism, arteriosclerosis, angina pectoris, gout, goitre, syphilis, haemophilia, Brights’s disease (nephritis) and bronchitis.”
i would say both.