What are medicinal properties of arsenicum?

In homeopathy, arsenicum album (Arsen. alb.) is a solution prepared by diluting aqueous arsenic trioxide generally until there is little or no arsenic remaining in the solution. It is used by homeopaths to treat a range of symptoms that include digestive disorders and, as an application of the homeopathic Law of Similars has been suggested by homeopaths as a treatment for arsenic poisoning

Since the arsenic oxide in a homeopathic preparation is normally non-existent, it is considered generally safe, although cases of arsenic poisoning from poorly prepared homeopathic treatments sold in India have been reported. When properly prepared, however, the extreme dilutions, typically to at least 1 in 1024, or 12C in homeopathic notation, mean that statistically it is extremely unlikely that any pill contains even a molecule of the original arsenic used. While some small, unblinded studies have claimed an effect on reducing arsenic toxicity, they do not recommend its large-scale use, and studies of homeopathic remedies have been shown to generally have problems that prevent them from being considered unambiguous evidence