Acetaminophen Overdose Rumack-Matthew Nomogram

Apply the Rumack-Matthew nomogram to determine N-acetylcysteine treatment necessity in acetaminophen overdose based on 4-hour post-ingestion plasma level and time since ingestion.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Apply the Rumack-Matthew nomogram to determine N-acetylcysteine treatment necessity in acetaminophen overdose based on 4-hour post-ingestion plasma level and time since ingestion

Each component has a specific meaning:

  • 4-hour post-ingestion plasma level — The 4-hour post-ingestion plasma level recorded for the scenario being assessed.
  • Time since ingestion — The time since ingestion recorded for the scenario being assessed.

Note: Interpret the apap rumack-matthew result against the thresholds and context described above.

How to Use

Enter the 4-hour post-ingestion plasma level, time since ingestion for the scenario you are assessing. Apply the Rumack-Matthew nomogram to determine N-acetylcysteine treatment necessity in acetaminophen overdose based on 4-hour post-ingestion plasma level and time since ingestion. Use the apap rumack-matthew result to inform your calculation.

Frequently Asked Questions