Related Experiment Videos
Neuroleptic malignant syndrome: two cases without muscle rigidity
1Department of Psychiatry, Queen Mary Hospital, Pokfulam, Hong Kong.
The Australian and New Zealand Journal of Psychiatry
|June 1, 1996
Summary
Neuroleptic malignant syndrome can occur without muscle rigidity. This syndrome involves fever and altered consciousness, highlighting a spectrum of clinical severity.
Area of Science:
- Neuroscience
- Pharmacology
- Clinical Medicine
Background:
- Neuroleptic malignant syndrome (NMS) is a rare but serious adverse reaction to antipsychotic medications.
- Classic NMS symptoms include hyperthermia, autonomic dysfunction, and altered mental status, often accompanied by lead-pipe rigidity.
Observation:
- This report details two cases of NMS presenting without muscle rigidity.
- Both patients experienced fever and altered consciousness after neuroleptic administration.
- Symptoms resolved upon neuroleptic discontinuation and recurred upon re-challenge.
Findings:
- The absence of muscle rigidity in these cases expands the known clinical spectrum of NMS.
- One patient received supportive care, while the other was treated with bromocriptine.
- Outcomes varied, with one patient surviving and the other succumbing.
Implications:
- The proposed pathophysiology involves central thermoregulatory, neuroregulatory, and autonomic nervous system dysfunction, alongside peripheral skeletal muscle involvement.
- These findings support the concept of a spectrum of clinical severity in NMS.
- Recognizing NMS variants without rigidity is crucial for timely diagnosis and management.