English physician who is best known for introducing a popular remedy known as Dover's Powder. This potent medicine contained ipecac, opium, and potassium sulfate. It was prescribed as an analgesic, a sedative, and a sudorific or diaphoretic (an agent that increases perspiration). Ipecac (ipecacuanha) is a powerful emetic (a medicine that causes vomiting). Although Dover practiced medicine in London, he was never certified by the College of Physicians. In An Ancient Physician's Legacy to his Country, Dover claimed that he had practiced medicine for 49 years.