Drug interactions
Interferon alfa 2b + Pexidartinib
Severity: Major
Interferon alfa 2b and Pexidartinib: major 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
Pexidartinib carries a boxed warning for serious and potentially fatal hepatotoxicity. Interferon alfa 2b can also cause liver enzyme elevations and hepatic injury, so the combination may increase the risk of liver damage.
What this interaction means in plain words
Interferon alfa 2b and Pexidartinib 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.
Interferon alfa 2b belongs to Anti Virals; Pexidartinib belongs to Oncology.
Why it happens
Additive hepatotoxicity from two agents that can each injure the liver.
What to do
Avoid the combination where possible. If unavoidable, monitor liver tests frequently and withhold pexidartinib or interferon for significant elevations.
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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Other interactions of Interferon alfa 2b
Other interactions of Pexidartinib
Frequently asked questions
Can I take Interferon alfa 2b with Pexidartinib?
MediHelp rates the interaction as major. Interferon alfa 2b and Pexidartinib 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. Pexidartinib carries a boxed warning for serious and potentially fatal hepatotoxicity. Interferon alfa 2b can also cause liver enzyme elevations and hepatic injury, so the combination may increase the risk of liver damage.
How serious is the interaction between Interferon alfa 2b and Pexidartinib?
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 where possible. If unavoidable, monitor liver tests frequently and withhold pexidartinib or interferon for significant elevations.
What other medicines interact with Interferon alfa 2b?
MediHelp also lists interactions of Interferon alfa 2b with, for example, Deferiprone, Hydroxyurea, Pretomanid. The full list is on the Interferon alfa 2b page.
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