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ARTICLE |

SMON Probably Occurred in 1938 in Japan FREE

Kiyohiko KATAHIRA, PhD; Kimihiro Nakae, PhD
JAMA. 1976;236(8):919-919. doi:10.1001/jama.1976.03270090015014
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To the Editor.—  One of the questions against the theory that iodochlorhydroxyquin causes subacute myelo-opticoneuropathy (SMON) was "Why has the disease become apparent only in the past decade when the drug has been used for four decades?" (220:273, 1972). In fact, reports of the outbreaks of SMON had appeared since 1958,1 although iodochlorhydroxyquin had been used orally from 19292 in Japan.To elucidate this problem, one of us (K. K.) studied the conditions of the use of iodochlorhydroxyquin before the Second World War through a review of the literature, especially the reports of clinical trials. Consequently, it was found that the daily doses were relatively small and the duration of administration short at that time. One of the reports published in 1938, however, stated that no adverse effect was observed when the drug was administered to 30 carriers of Salmonella typhi in a daily dose of 1.0 to

REFERENCES

Kusui K, Kamiide M:  A cured case of intractable hemorrhagic diarrhea with polyneuropathy-like syndrome (Japanese) . Psychiatr Neurol Jap 60:1220, 1958;.
Kajikawa S:  Internal use of Vioform (Japanese) . CIBA-Ziho 18:15, 1929;.
Katahira K, Nakae K:  Medication with iodochlorhydroxyquin and outbreak of SMON-like cases before the Second World War in Japan (Japanese) . Igaku no Ayumi 84:525-530, 1973;.
Takasu T, Toyokura Y, Nakae K, et al:  A probable case of SMON occurred in 1938 in Japan: Its clinico-epidemiological study (Japanese) . Jap J Clin Med 31:692-699, 1973;.
Katahira K:  A probable case of SMON occurred in 1938 in Japan: Its follow-up study (Japanese) . Igaku no Ayumi 94:129-130, 1975;.
Takasu T:  Present status of a suspected case of SMON 35 years after its onset in 1938 in Japan (Japanese) . Read before the SMON Research Committee of the Japanese Government on Jan 29, 1974 , to be published.

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Kusui K, Kamiide M:  A cured case of intractable hemorrhagic diarrhea with polyneuropathy-like syndrome (Japanese) . Psychiatr Neurol Jap 60:1220, 1958;.
Kajikawa S:  Internal use of Vioform (Japanese) . CIBA-Ziho 18:15, 1929;.
Katahira K, Nakae K:  Medication with iodochlorhydroxyquin and outbreak of SMON-like cases before the Second World War in Japan (Japanese) . Igaku no Ayumi 84:525-530, 1973;.
Takasu T, Toyokura Y, Nakae K, et al:  A probable case of SMON occurred in 1938 in Japan: Its clinico-epidemiological study (Japanese) . Jap J Clin Med 31:692-699, 1973;.
Katahira K:  A probable case of SMON occurred in 1938 in Japan: Its follow-up study (Japanese) . Igaku no Ayumi 94:129-130, 1975;.
Takasu T:  Present status of a suspected case of SMON 35 years after its onset in 1938 in Japan (Japanese) . Read before the SMON Research Committee of the Japanese Government on Jan 29, 1974 , to be published.
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