This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
The compounds of these metals have several physiological and some chemical points in common. The oxide of each is externally a powerful caustic. Internally Arsenic, Antimony, and (as far as we know) Chromium compounds are severe gastro-intestinal irritants. Arsenic and Antimony in large doses both cause general fatty degeneration.