Drug interactions
Desvenlafaxine + Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol
Severity: Moderate
Desvenlafaxine and Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol: 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
Desvenlafaxine can cause hyponatremia through SIADH, especially in older adults. Large-volume bowel preparations cause fluid shifts and electrolyte disturbances, which may add to the risk of hyponatremia and its complications such as seizures. The risk is greatest in patients who are elderly, dehydrated or on other agents affecting sodium.
What this interaction means in plain words
Desvenlafaxine and Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol 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
Additive risk of electrolyte disturbance: SNRI-induced SIADH combined with fluid and electrolyte shifts from bowel preparation.
What to do
Ensure adequate hydration and check serum sodium in high-risk patients, such as the elderly, before and after bowel preparation. Report headache, confusion, nausea or seizures promptly.
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 Desvenlafaxine
- Desvenlafaxine + Isocarboxazid Contraindicated
- Desvenlafaxine + Methylene blue Contraindicated
- Desvenlafaxine + Phenelzine Contraindicated
- Desvenlafaxine + Rasagiline Contraindicated
- Desvenlafaxine + Safinamide Contraindicated
- Desvenlafaxine + Selegiline Contraindicated
Frequently asked questions
Can I take Desvenlafaxine with Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol?
MediHelp rates the interaction as moderate. Desvenlafaxine and Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol 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. Desvenlafaxine can cause hyponatremia through SIADH, especially in older adults. Large-volume bowel preparations cause fluid shifts and electrolyte disturbances, which may add to the risk of hyponatremia and its complications such as seizures. The risk is greatest in patients who are elderly, dehydrated or on other agents affecting sodium.
How serious is the interaction between Desvenlafaxine and Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol?
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 serum sodium in high-risk patients, such as the elderly, before and after bowel preparation. Report headache, confusion, nausea or seizures promptly.
What other medicines interact with Desvenlafaxine?
MediHelp also lists interactions of Desvenlafaxine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Desvenlafaxine page.
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