Frontiers in neuroscienceJun 15, 2026

Temporary improvement in thinking and daily skills in advanced Alzheimer's after high-dose psilocybin mushroom use: a case report

Psychedelic Science Weekly Brief ↗PubMed ↗DOI ↗OA ↗

Updated Jun 16, 2026

Abstract

The administration of 5 g of psilocybin-containing mushrooms led to notable functional improvements in an 80-year-old woman with advanced Alzheimer's disease.

Following psilocybin administration, the patient exhibited spontaneous autobiographical speech approximately 19 hours later.
Improvements included restoration of urinary continence and enhanced mobility, allowing for autonomous dressing.
The patient showed increased emotional responsiveness and sustained social interaction over days and weeks.
Contextual memory retrieval and preserved working memory for social context were also observed.
These findings indicate that some functional capacity may remain accessible in advanced stages of Alzheimer's disease under specific conditions.

Simplified

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.