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Drug interactions

Calcium acetate + Tiludronate

Severity: Moderate

Calcium acetate and Tiludronate: 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

Oral calcium salts bind tiludronate in the gut and reduce its absorption. This can lower bone benefit from the bisphosphonate.

What this interaction means in plain words

Calcium acetate and Tiludronate 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 acetate belongs to Genitourinary; Tiludronate belongs to Musculoskeletal.

Evidence level: High

Why it happens

Divalent calcium cations chelate tiludronate in the gastrointestinal tract, forming poorly absorbable complexes.

What to do

Take tiludronate with water on an empty stomach and keep calcium products, including binders, at least 2 hours apart from it.

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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Calcium acetate with Tiludronate?

MediHelp rates the interaction as moderate. Calcium acetate and Tiludronate 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. Oral calcium salts bind tiludronate in the gut and reduce its absorption. This can lower bone benefit from the bisphosphonate.

How serious is the interaction between Calcium acetate and Tiludronate?

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 tiludronate with water on an empty stomach and keep calcium products, including binders, at least 2 hours apart from it.

What other medicines interact with Tiludronate?

MediHelp also lists interactions of Tiludronate with, for example, Acetylsalicylic acid, Aluminum hydroxide, Calcium carbonate. The full list is on the Tiludronate page.

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