A powerful drug, kept in the apothecary shops in the form of a powder. Sometimes prescribed as an internal medicine in scrofula, ulcer of the stomach, etc., in one-grain doses ; but it is much more often used as an outward application. It is very healing to foul ulcers, wounds not doing well, syphilitic sores, etc. ; being antiseptic ; that is, corrective and preventive of decay and putrefaction. While, however, a little of the powder of iodoform may be safely sprinkled now and then over a foul sore, to promote its cleansing and healing, it is not safe to use it without limit; as a large amount of it absorbed may be even poisonous. A bottle or box of it ought, when kept, to be labelled poison.