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A Case of Recurrence of Psychosis Caused by a Single Ingestion of Ayahuasca Shinga ESAKI 1,2 , Mitsuru UMENO 1,3 , Takashi GOMIBUCHI 4 1Department of Psychiatry, Tokyo Metropolitan Matsuzawa Hospital, Tokyo, Japan 2Department of Psychiatry, Koyukai Memorial Hospital 3Graduate School of Comprehensive Human Sciences, University of Tsukuba 4Department of Psychiatry, Aoki Hospital Keyword: Ayahuasca , Behavioral sensitization , Hallucinogen-induced psychosis , Magic mushroom , N,N-dimethyltryptamine , DMT pp.797-800
Published Date 2010/8/15
DOI https://doi.org/10.11477/mf.1405101682
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 A 34-year-old woman first consumed magic mushrooms (MM) when she was approximately 26 years old. Subsequently, she consumed MM approximately 50 times;over the course of time even half the quantity of MM taken initially was sufficient to induce a hallucinogenic state. She was hospitalized at the age of 28 because she had become emotionally unstable after taking MM and entered a state of stupor 2 days later. The patient stopped taking MM at the age of 32 and started leading a stable lifestyle. She ingested Ayahuasca, a drink containing plant-derived hallucinogenic ingredients for the first time at the age of 34. On the fourth day after ingesting the drink, she rapidly became emotionally unstable and was unable to hold conversations;on the fifth day, she developed catatonic syndrome (a psychotic disorder caused by the use of hallucinogens;ICD-10:F16.5) and was hospitalized. Her treatment commenced with intravenous haloperidol therapy (20mg/day). Oral risperidone therapy (12mg/day) commenced on the sixth day when the patient became emotionally stable. Her psychotic symptoms disappeared by the 35th day. At the time of discharge her risperidone dose had been reduced to 2mg/day. The progress of this case suggests that the patient had developed reverse tolerance. The results of some studies indicate that Ayahuasca is toxic. There is need for a greater awareness of the substantial risk involved in ingesting substances with hallucinogenic ingredients particularly in the case of individuals who develop behavioral sensitization.


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電子版ISSN 1882-126X 印刷版ISSN 0488-1281 医学書院

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