Methadone QTc Risk Stratification

Stratify QTc prolongation and torsades de pointes risk for methadone therapy based on dose, ECG QTc interval, electrolytes, concomitant QT-prolonging drugs, and cardiac history.

Weight
Height
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.
Advertisement

How It Works

Stratify QTc prolongation and torsades de pointes risk for methadone therapy based on dose, ECG QTc interval, electrolytes, concomitant QT-prolonging drugs, and cardiac history

Each component has a specific meaning:

  • Dose — The dose recorded for the scenario being assessed.
  • ECG QTc interval — The ecg qtc interval recorded for the scenario being assessed.
  • Electrolytes — The electrolytes recorded for the scenario being assessed.
  • Concomitant QT-prolonging drugs — The concomitant qt-prolonging drugs recorded for the scenario being assessed.
  • Cardiac history — The cardiac history recorded for the scenario being assessed.

Note: Interpret the methadone qtc risk result against the thresholds and context described above.

How to Use

Enter the dose, ECG QTc interval, electrolytes, concomitant QT-prolonging drugs, cardiac history for the scenario you are assessing. Stratify QTc prolongation and torsades de pointes risk for methadone therapy based on dose, ECG QTc interval, electrolytes, concomitant QT-prolonging drugs, and cardiac history. Use the methadone qtc risk result to inform your calculation.

Frequently Asked Questions