Drug interactions
Ifosfamide + Saquinavir
Severity: Moderate
Ifosfamide and Saquinavir: 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
Saquinavir inhibits CYP3A4, which may reduce conversion of ifosfamide to its active metabolites. This could lower antitumour effect, although clinical data are minimal.
What this interaction means in plain words
Ifosfamide and Saquinavir 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.
Why it happens
CYP3A4 inhibition reduces ifosfamide bioactivation.
What to do
Consider an antiretroviral with less CYP3A4 inhibition. If combined, monitor for reduced response and unexpected toxicity.
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
Frequently asked questions
Can I take Ifosfamide with Saquinavir?
MediHelp rates the interaction as moderate. Ifosfamide and Saquinavir 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. Saquinavir inhibits CYP3A4, which may reduce conversion of ifosfamide to its active metabolites. This could lower antitumour effect, although clinical data are minimal.
How serious is the interaction between Ifosfamide and Saquinavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Consider an antiretroviral with less CYP3A4 inhibition. If combined, monitor for reduced response and unexpected toxicity.
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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