Drug interactions
Calcium carbonate + Ibandronate
Severity: Moderate
Calcium carbonate and Ibandronate: 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 binds oral ibandronate in the gut and markedly reduces its absorption. This can undermine osteoporosis treatment.
What this interaction means in plain words
Calcium carbonate and Ibandronate 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 belongs to Gastrointestinal Tract; Ibandronate belongs to Musculoskeletal.
Why it happens
Chelation of ibandronate by calcium forms insoluble complexes that are poorly absorbed.
What to do
Take ibandronate fasting with plain water and wait at least 60 minutes before calcium or other supplements, or as the label directs.
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
Other interactions of Ibandronate
- Aluminum hydroxide + Ibandronate Moderate
- Calcium acetate + Ibandronate Moderate
- Calcium chloride + Ibandronate Moderate
- Calcium citrate + Ibandronate Moderate
- Calcium gluconate + Ibandronate Moderate
- Calcium + Ibandronate Moderate
Frequently asked questions
Can I take Calcium carbonate with Ibandronate?
MediHelp rates the interaction as moderate. Calcium carbonate and Ibandronate 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 binds oral ibandronate in the gut and markedly reduces its absorption. This can undermine osteoporosis treatment.
How serious is the interaction between Calcium carbonate and Ibandronate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Take ibandronate fasting with plain water and wait at least 60 minutes before calcium or other supplements, or as the label directs.
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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