Drug interactions
Methadone + Sodium sulfate / potassium sulfate / magnesium sulfate
Severity: Moderate
Methadone and Sodium sulfate / potassium sulfate / magnesium sulfate: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Osmotic bowel preparations can cause fluid loss and electrolyte disturbances such as low potassium and magnesium. These changes can increase the risk of QT prolongation and arrhythmia in patients taking methadone.
What this interaction means in plain words
Methadone and Sodium sulfate / potassium sulfate / magnesium sulfate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Bowel-preparation-induced electrolyte disturbance potentiates methadone QT prolongation.
What to do
Ensure adequate hydration and check electrolytes in patients on methadone with other QT risk factors. Consider an ECG before and after the procedure in higher-risk patients.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Methadone
- Alvimopan + Methadone Contraindicated
- Calcium / magnesium / potassium / sodium oxybates + Methadone Contraindicated
- Droperidol + Methadone Contraindicated
- Ibutilide + Methadone Contraindicated
- Isocarboxazid + Methadone Contraindicated
- Lefamulin + Methadone Contraindicated
Frequently asked questions
Can I take Methadone with Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates the interaction as moderate. Methadone and Sodium sulfate / potassium sulfate / magnesium sulfate can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Osmotic bowel preparations can cause fluid loss and electrolyte disturbances such as low potassium and magnesium. These changes can increase the risk of QT prolongation and arrhythmia in patients taking methadone.
How serious is the interaction between Methadone and Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Ensure adequate hydration and check electrolytes in patients on methadone with other QT risk factors. Consider an ECG before and after the procedure in higher-risk patients.
What other medicines interact with Methadone?
MediHelp also lists interactions of Methadone with, for example, Alvimopan, Calcium / magnesium / potassium / sodium oxybates, Droperidol. The full list is on the Methadone page.
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