Drug interactions
Calcium + Sodium sulfate / potassium sulfate / magnesium sulfate
Severity: Moderate
Calcium 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
Sulfate-based bowel preparations can cause fluid loss and electrolyte shifts. Calcium given in the same period may add to the risk of electrolyte disturbance, which can lead to arrhythmias, seizures or renal impairment, especially in patients with kidney or heart disease.
What this interaction means in plain words
Calcium 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
Additive effects on fluid and electrolyte balance; no specific direct interaction is established.
What to do
Ensure adequate hydration and check serum electrolytes, including calcium, magnesium and potassium, in high-risk patients. Review the need for calcium supplements around the time of bowel preparation.
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 Calcium
- Calcium + Ceftriaxone Contraindicated
- Acalabrutinib + Calcium Moderate
- Alendronate + Calcium Moderate
- Atazanavir + Calcium Moderate
- Baloxavir marboxil + Calcium Moderate
- Bendroflumethiazide + Calcium Moderate
Frequently asked questions
Can I take Calcium with Sodium sulfate / potassium sulfate / magnesium sulfate?
MediHelp rates the interaction as moderate. Calcium 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. Sulfate-based bowel preparations can cause fluid loss and electrolyte shifts. Calcium given in the same period may add to the risk of electrolyte disturbance, which can lead to arrhythmias, seizures or renal impairment, especially in patients with kidney or heart disease.
How serious is the interaction between Calcium 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 serum electrolytes, including calcium, magnesium and potassium, in high-risk patients. Review the need for calcium supplements around the time of bowel preparation.
What other medicines interact with Calcium?
MediHelp also lists interactions of Calcium with, for example, Ceftriaxone, Acalabrutinib, Alendronate. The full list is on the Calcium page.
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