Neuroleptic Malignant Syndrome: A Case Report of the Oldest Man in Literature

Forouzan Elyasi1,2, Mohsen Aarabi3, Majidreza Adelani4

  • 1Sexual and Reproductive Health Research Center, Psychiatry and Behavioral Sciences Research Center, Addiction Institute Mazandaran University of Medical Sciences Sari Iran.

Clinical Case Reports
|October 13, 2025
PubMed

Insights

This study reports the oldest documented case of neuroleptic malignant syndrome (NMS) in a 96-year-old man. Older adults face higher NMS risks, even with low antipsychotic doses, exacerbated by other health factors.

Area of Science:

  • Geriatric Medicine
  • Clinical Pharmacology
  • Neuroscience

Background:

  • Neuroleptic Malignant Syndrome (NMS) is a rare but life-threatening reaction to antipsychotic medications.
  • Older adults are particularly vulnerable to adverse drug reactions, including NMS.
  • Existing literature lacks comprehensive data on NMS in the very elderly population.

Purpose of the Study:

  • To report the oldest documented case of NMS in medical literature.
  • To highlight the increased susceptibility of older adults to NMS.
  • To discuss potential exacerbating factors for NMS in elderly patients.

Main Methods:

  • Case report of a 96-year-old male patient diagnosed with NMS.
  • Review of medical literature for documented cases of NMS in elderly individuals.
  • Analysis of patient's medication history and comorbidities.

Main Results:

  • The patient, aged 96, presented with symptoms consistent with NMS.
  • This represents the oldest documented case of NMS to date.
  • Older adults demonstrated increased susceptibility to NMS, even at low antipsychotic doses.

Conclusions:

  • NMS can occur in very elderly individuals, even with minimal antipsychotic exposure.
  • Preexisting neurological conditions and concurrent use of cholinesterase inhibitors may increase NMS risk in older adults.
  • Further research is needed to understand NMS pathophysiology and management in the geriatric population.

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