Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 8/28/2025

Paracetamol Overdose and Neurological Effects

Introduction to Paracetamol Toxicity

  • Paracetamol overdose does not typically cause bilateral lower limb motor and sensory deficits as part of its toxicity profile, as the primary target organ for paracetamol toxicity is the liver rather than the nervous system 1, 2, 3

Neurological Manifestations

  • Hepatic encephalopathy presents with asterixis (flapping tremor) and global neurological dysfunction, which are indirect consequences of liver failure 3
  • Hepatic encephalopathy does not cause focal neurological deficits such as isolated bilateral lower limb motor and sensory deficits 3

Differential Diagnosis

  • If a patient presents with paracetamol overdose and bilateral lower limb motor and sensory deficits, clinicians should consider alternative toxins or co-ingestants that may have neurotoxic properties 3
  • Spinal cord compression from positioning during prolonged unconsciousness should be considered as a potential cause of bilateral lower limb deficits 3
  • Rhabdomyolysis-induced compartment syndrome from prolonged immobility is another possible cause of bilateral lower limb deficits 3
  • Unrelated neurological conditions coinciding with the overdose should also be investigated 3

Conclusion

  • When evaluating a patient with bilateral lower limb motor and sensory deficits following paracetamol overdose, it is essential to recognize that these neurological findings are not directly attributable to paracetamol toxicity and warrant investigation for alternative causes 1, 3