Drug interactions
Deferiprone + Mercaptopurine
Severity: Major
Deferiprone and Mercaptopurine: major interaction.
Last updated Sources: US FDA label
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
Both drugs can suppress bone marrow, and deferiprone carries a risk of neutropenia and agranulocytosis. Used together, the risk of severe neutropenia and serious infection is increased.
What this interaction means in plain words
Deferiprone and Mercaptopurine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Deferiprone belongs to Miscellaneous; Mercaptopurine belongs to Oncology.
Why it happens
Additive myelosuppression, with deferiprone-induced neutropenia combined with the marrow toxicity of mercaptopurine.
What to do
Avoid the combination if possible. If both are necessary, monitor absolute neutrophil count more frequently and interrupt deferiprone for neutropenia.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Mercaptopurine
- Adenovirus types 4 and 7 live + Mercaptopurine Contraindicated
- Azathioprine + Mercaptopurine Contraindicated
- Bcg vaccine live + Mercaptopurine Contraindicated
- Febuxostat + Mercaptopurine Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Mercaptopurine Contraindicated
- Mercaptopurine + Smallpox vaccine live Contraindicated
Other interactions of Deferiprone
- Clozapine + Deferiprone Contraindicated
- Abemaciclib + Deferiprone Major
- Acalabrutinib + Deferiprone Major
- Ado-trastuzumab emtansine + Deferiprone Major
- Ado-trastuzumab + Deferiprone Major
- Aldesleukin + Deferiprone Major
Frequently asked questions
Can I take Deferiprone with Mercaptopurine?
MediHelp rates the interaction as major. Deferiprone and Mercaptopurine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both drugs can suppress bone marrow, and deferiprone carries a risk of neutropenia and agranulocytosis. Used together, the risk of severe neutropenia and serious infection is increased.
How serious is the interaction between Deferiprone and Mercaptopurine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible. If both are necessary, monitor absolute neutrophil count more frequently and interrupt deferiprone for neutropenia.
What other medicines interact with Mercaptopurine?
MediHelp also lists interactions of Mercaptopurine with, for example, Adenovirus types 4 and 7 live, Azathioprine, Bcg vaccine live. The full list is on the Mercaptopurine page.
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