Ferrum Arsenicicum To purchase Ferrum Arsenicicum and other homeopathic remedies online, please click the button above. Remedy info unavailable. Ferrum Arsenicicum is available to buy through our online shop from WHP in USA, by clicking the red 'View Purchase Options' button. Alternative names, keywords, and common mis-spellings Ferrum Arsenicum, Arseniate of Iron, Triferric diarsenate