Liver of sulfur was once used to counteract poisoning with several metals, including arsenic, copper, lead, and antimony.  A lump was dissolved in warm water and the patient was instructed to drink the solution three or four times over the course of an hour.  At one time sulfurated potash was used to combat arthritis.  It eventually fell into disfavor for medical purposes because sulfides and polysulfides were discovered to be toxic in their own right.