Drug interactions
Calcium carbonate + Polysaccharide iron
Severity: Moderate
Calcium carbonate and Polysaccharide iron: 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
Calcium carbonate can reduce the absorption of oral iron, which may lessen the response to iron therapy in iron deficiency anemia. Long-term concurrent use can slow the recovery of hemoglobin and iron stores.
What this interaction means in plain words
Calcium carbonate and Polysaccharide iron 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
Calcium and the higher gastric pH it produces reduce iron solubility and intestinal uptake, and calcium competes with iron at absorption sites.
What to do
Separate the doses by at least 2 hours, ideally giving iron away from calcium-containing products, and monitor hemoglobin and ferritin.
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 carbonate
Frequently asked questions
Can I take Calcium carbonate with Polysaccharide iron?
MediHelp rates the interaction as moderate. Calcium carbonate and Polysaccharide iron 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. Calcium carbonate can reduce the absorption of oral iron, which may lessen the response to iron therapy in iron deficiency anemia. Long-term concurrent use can slow the recovery of hemoglobin and iron stores.
How serious is the interaction between Calcium carbonate and Polysaccharide iron?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Separate the doses by at least 2 hours, ideally giving iron away from calcium-containing products, and monitor hemoglobin and ferritin.
What other medicines interact with Calcium carbonate?
MediHelp also lists interactions of Calcium carbonate with, for example, Acalabrutinib, Alendronate, Amlodipine-hydrochlorothiazide-valsartan. The full list is on the Calcium carbonate page.
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