Drug interactions
Hydroxychloroquine + Sodium sulfate / potassium sulfate / magnesium sulfate
Severity: Moderate
Hydroxychloroquine 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 hypokalemia and hypomagnesemia. These disturbances may add to the QT-prolonging effect of hydroxychloroquine and raise the risk of arrhythmia.
What this interaction means in plain words
Hydroxychloroquine 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-prep-induced electrolyte shifts and dehydration potentiate hydroxychloroquine QTc prolongation.
What to do
Ensure adequate hydration and check electrolytes in patients with other arrhythmia risk factors. Consider an ECG before and after bowel preparation in high-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 Hydroxychloroquine
- Arsenic trioxide + Hydroxychloroquine Contraindicated
- Cisapride + Hydroxychloroquine Contraindicated
- Dronedarone + Hydroxychloroquine Contraindicated
- Hydroxychloroquine + Pimozide Contraindicated
- Hydroxychloroquine + Thioridazine Contraindicated
- Hydroxychloroquine + Vandetanib Contraindicated
Frequently asked questions
Can I take Hydroxychloroquine with Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates the interaction as moderate. Hydroxychloroquine 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 hypokalemia and hypomagnesemia. These disturbances may add to the QT-prolonging effect of hydroxychloroquine and raise the risk of arrhythmia.
How serious is the interaction between Hydroxychloroquine 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 with other arrhythmia risk factors. Consider an ECG before and after bowel preparation in high-risk patients.
What other medicines interact with Hydroxychloroquine?
MediHelp also lists interactions of Hydroxychloroquine with, for example, Arsenic trioxide, Cisapride, Dronedarone. The full list is on the Hydroxychloroquine page.
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