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Drug interactions

Cyclophosphamide + Denosumab

Severity: Moderate

Cyclophosphamide and Denosumab: 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

Cyclophosphamide is immunosuppressive and denosumab labeling warns of serious infections, so patients receiving both may be more susceptible to infection. Cyclophosphamide can also cause hypocalcemia risk context through poor intake or renal effects, while denosumab itself can lower calcium.

What this interaction means in plain words

Cyclophosphamide and Denosumab 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.

Cyclophosphamide belongs to Oncology; Denosumab belongs to Oncology.

Evidence level: Low

Why it happens

Additive immunosuppression and infection risk; no pharmacokinetic interaction is established.

What to do

Monitor for signs of infection and check serum calcium, correcting deficiency before and during denosumab therapy.

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 Cyclophosphamide with Denosumab?

MediHelp rates the interaction as moderate. Cyclophosphamide and Denosumab 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. Cyclophosphamide is immunosuppressive and denosumab labeling warns of serious infections, so patients receiving both may be more susceptible to infection. Cyclophosphamide can also cause hypocalcemia risk context through poor intake or renal effects, while denosumab itself can lower calcium.

How serious is the interaction between Cyclophosphamide and Denosumab?

MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for signs of infection and check serum calcium, correcting deficiency before and during denosumab therapy.

What other medicines interact with Cyclophosphamide?

MediHelp also lists interactions of Cyclophosphamide with, for example, Adenovirus types 4 and 7 live, Belatacept, Bendamustine. The full list is on the Cyclophosphamide page.

Full monographs, dosing and an interaction checker in the MediHelp app

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