title: Snape's purging pill for horses--1692.
mesh_terms: D000818:Animals; D002400:Cathartics / Q000266:history* / Q000627:therapeutic use; D004739:England; D049670:History, 17th Century; D006734:Horse Diseases / Q000188:drug therapy; D006736:Horses; D008092:Literature, Medieval; D014730:Veterinary Medicine / Q000266:history*
chemical_list: D002400:Cathartics