When the Cure Is the Cause: The Case of the Green Hairy Tongue

December 27, 2017

(Undark Magazine) – Then, in late 1970, three years after the drug theory was dismissed, a pharmacologist made a forehead-slapping discovery. The two presumably different antibiotics, it turned out, were simply different brand names for clioquinol, a drug used to treat amoebic dysentery. The green hairy tongue and green urine, it turned out, had been caused by the breakdown of clioquinol in the patients’ systems. One month after the discovery, Japan banned clioquinol, and the SMON epidemic — one of the largest drug disasters in history — came to an abrupt end.

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