Drug interactions
Fluoxetine + Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol
Severity: Moderate
Fluoxetine 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
Fluoxetine can cause SIADH and hyponatremia, and osmotic bowel preparations can shift fluid and electrolytes. Together they may increase the risk of water retention and clinically significant hyponatremia, which can lead to seizures.
What this interaction means in plain words
Fluoxetine 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 effects on water and electrolyte balance: SSRI-related SIADH combined with bowel prep fluid and electrolyte shifts.
What to do
Encourage balanced fluid intake and check sodium in older or high-risk patients. Report confusion, headache or nausea 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 Fluoxetine
- Fluoxetine + Isocarboxazid Contraindicated
- Fluoxetine + Mavacamten Contraindicated
- Fluoxetine + Methylene blue Contraindicated
- Fluoxetine + Phenelzine Contraindicated
- Fluoxetine + Pimozide Contraindicated
- Fluoxetine + Rasagiline Contraindicated
Frequently asked questions
Can I take Fluoxetine with Sodium sulfate / potassium chloride / magnesium sulfate / polyethylene glycol?
MediHelp rates the interaction as moderate. Fluoxetine 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. Fluoxetine can cause SIADH and hyponatremia, and osmotic bowel preparations can shift fluid and electrolytes. Together they may increase the risk of water retention and clinically significant hyponatremia, which can lead to seizures.
How serious is the interaction between Fluoxetine 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: Encourage balanced fluid intake and check sodium in older or high-risk patients. Report confusion, headache or nausea promptly.
What other medicines interact with Fluoxetine?
MediHelp also lists interactions of Fluoxetine with, for example, Isocarboxazid, Mavacamten, Methylene blue. The full list is on the Fluoxetine page.
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