What are the criteria for referring a patient with paracetamol overdose to secondary care?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 22 August 2025Updated: 22 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

Criteria for referring a patient with paracetamol overdose to secondary care include:

  • Any patient presenting with a significant paracetamol overdose, especially if the amount ingested exceeds the recommended toxic threshold or if the timing of ingestion is uncertain.
  • Patients showing signs of liver dysfunction or abnormal liver function tests, as these indicate potential hepatotoxicity requiring specialist management.
  • Patients with evidence of altered mental state, coagulopathy, or metabolic acidosis, which suggest severe poisoning and complications.
  • Patients who require treatment with N-acetylcysteine (NAC) for antidotal therapy, which is typically administered in secondary care settings.
  • Patients with risk factors such as chronic alcohol use, malnutrition, or concomitant use of enzyme-inducing drugs, which increase the risk of toxicity and necessitate specialist assessment.
  • Any patient with delayed presentation (more than 8 hours post-ingestion) or those who have taken repeated supratherapeutic doses over more than 24 hours.

Referral should be prompt to ensure timely administration of antidote and monitoring for complications.

Educational content only. Always verify information and use clinical judgement.