Radithor

Radithor was a radioactive patent medicine brand of distilled water containing at least 1 microcurie (37 kBq) each of the radium-226 and 228 isotopes, sold in half-ounce bottles. In 1932, the illness and death of business magnate Eben Byers was unambiguously linked to his fervent use of Radithor, leading to the collapse of the radium fad and the strengthening of regulatory control of pharmaceutical and radioactive products in the United States.

Introduced in 1918, Radithor was William J. A. Bailey's biggest commercial success, selling 400,000 bottles between 1925 and 1930. The Food and Drug Administration (FDA) issued warnings against the use of Radithor but did not have the authority to ban it during this period.