This section is from the book "Materia Medica And Therapeutics Inorganic Substances", by Charles D. F. Phillips. Also available from Amazon: Materia medica and therapeutics.
The emetic action of antimony has been utilized for the relief of chorea, and the influence of the remedy has been explained as reflected through the vagus nerve to its central origin in the medulla, inducing sedative effects in that part (Ringer). Boulay and others have recorded successful cases from the use of nauseating doses (Bulletin de Therapeutique, v., 52-4, London Medical Review, 1861), and Dr. West recommended it, but I cannot consider it a desirable treatment, nor is the evidence in its favor very strong. Comparing it with arsenical treatment in twelve cases in Parisian hospitals, only half the number were reported cured by antimony, and some of these lasted long enough at least for natural recovery (fifty-eight days); whereas of eleven cases treated by arsenic all got well (M. Long). Of course, in comparisons of this kind we must make some allowance for the tendency of chorea to recover under judicious management, independently of medicine, but the general evidence in favor of arsenic much outweighs that in favor of antimony.