Transient multidomain functional improvement in advanced Alzheimer’s disease following high-dose psilocybin-containing mushroom administration: a case report

Summary & key facts

This is a single case report about an 80-something woman with about 10 years of Alzheimer's disease who was given 5 grams of psilocybin-containing mushrooms by mouth. After an intense early reaction and a long sleep-like period, she showed a clear but temporary return of many abilities over the following hours, days, and weeks — for example, she spoke about her life, walked and dressed more on her own, remembered people and situations, and showed more emotion and social interest. The authors say this does not mean the disease was cured, but it suggests that some late-stage patients may still have hidden brain abilities that can briefly become available after strong brain-modulating experiences.

Key facts:

• The report describes one woman in her eighties with about a 10-year history of Alzheimer's disease and several years of severe decline in daily function and speech.
• She received a single oral dose of 5 grams of psilocybin-containing mushrooms (Enigma strain).
• During the first hours after taking the mushrooms she had strong bodily reactions, including heavy sweating and signs the doctors thought might be high body temperature, followed by a long deep sleep-like state.
• Around 19 hours after taking the mushrooms she began to speak about her own life without being prompted.
• Over the next days and weeks she showed improvements in many areas: urinary continence returned, walking improved, she could dress herself more independently, her emotional responsiveness increased, and she engaged more in social conversation.
• Some memory skills returned in context: she could retrieve autobiographical memories and keep track of social information for short periods.
• The improvements were temporary and the authors emphasize this is a single case, so it cannot prove that psilocybin reverses Alzheimer’s disease.
• The authors suggest the case shows that even in late-stage Alzheimer’s there may be remaining brain function that can become accessible under particular brain-changing conditions, but more research is needed.

Abstract

Background: Advanced Alzheimer's disease (AD) is generally regarded as a stage of irreversible functional decline. Psilocybin is known to transiently alter large-scale brain network dynamics and to induce plasticity-related mechanisms in preclinical models, yet clinical data in advanced dementia remain lacking. Case presentation: We report the case of an octogenarian Japanese-American woman with a 10-year history of Alzheimer's disease, including 5 years of marked hypofunction and predominantly monosyllabic speech. Baseline features included chronic urinary incontinence, executive dysfunction, dysphagia, dependent mobility, flat affect, and severe reduction in spontaneous communication. The patient received 5 g of orally administered psilocybin-containing mushrooms (Enigma strain). The acute phase was marked by autonomic activation, clinically suspected hyperthermia, profuse sweating, and a prolonged deep sleep-like state. Approximately 19 h post-administration, spontaneous autobiographical speech emerged. Over subsequent days and weeks, functional improvements included restoration of urinary continence, improved ambulation, autonomous dressing, increased emotional responsiveness, sustained social interaction, contextual memory retrieval, preserved working memory for social context, and spontaneous conversational engagement. Conclusion: This case documents transient multidomain functional improvement in advanced Alzheimer's disease following psilocybin administration. The findings do not imply disease reversal but suggest that residual functional capacity may persist in late-stage neurodegeneration and may become transiently accessible under specific neuromodulatory conditions.

Topics

Forensic Toxicology and Drug Analysis Pain Management and Placebo Effect Psychedelics and Drug Studies

Categories

Clinical Psychology Psychology Social Sciences

Tags

Audiology Cardiology Cognition Dementia Disease Executive functions Hoarding (animal behavior) Internal medicine Medicine Memory impairment Neurodegeneration Neurological disorder Neuroscience Parkinson's disease Pathophysiology Physical medicine and rehabilitation Presentation (obstetrics) Psilocybin Psychology Recall Spontaneous recovery Urinary incontinence Urinary system Working memory

Substances

Psilocybin

Conditions & symptoms

Feeling disconnected from others Lack of energy or motivation