Drug interactions
Belzutifan + Ifosfamide
Severity: Moderate
Belzutifan and Ifosfamide: 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
Belzutifan can induce CYP3A4 and may lower exposure to CYP3A4 substrates. Since ifosfamide is activated partly by CYP3A4, the effect on efficacy and toxicity is uncertain.
What this interaction means in plain words
Belzutifan and Ifosfamide 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.
Belzutifan belongs to Miscellaneous; Ifosfamide belongs to Oncology.
Why it happens
CYP3A4 induction by belzutifan may alter ifosfamide metabolism and the ratio of active to toxic metabolites.
What to do
Monitor for changes in ifosfamide efficacy and toxicity, including neurotoxicity and myelosuppression. Avoid the combination if an alternative is available.
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 Ifosfamide
- Adenovirus types 4 and 7 live + Ifosfamide Contraindicated
- Ifosfamide + Measles mumps and rubella vaccine Contraindicated
- Ifosfamide + Measles mumps and rubella vaccine live Contraindicated
- Ifosfamide + Measles mumps rubella and varicella vaccine live Contraindicated
- Ifosfamide + Measles vaccine Contraindicated
- Ifosfamide + Rotavirus oral vaccine live Contraindicated
Other interactions of Belzutifan
Frequently asked questions
Can I take Belzutifan with Ifosfamide?
MediHelp rates the interaction as moderate. Belzutifan and Ifosfamide 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. Belzutifan can induce CYP3A4 and may lower exposure to CYP3A4 substrates. Since ifosfamide is activated partly by CYP3A4, the effect on efficacy and toxicity is uncertain.
How serious is the interaction between Belzutifan and Ifosfamide?
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 changes in ifosfamide efficacy and toxicity, including neurotoxicity and myelosuppression. Avoid the combination if an alternative is available.
What other medicines interact with Ifosfamide?
MediHelp also lists interactions of Ifosfamide with, for example, Adenovirus types 4 and 7 live, Measles mumps and rubella vaccine, Measles mumps and rubella vaccine live. The full list is on the Ifosfamide page.
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