Drug interactions
Belzutifan + Estradiol
Severity: Moderate
Belzutifan and Estradiol: 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 is a CYP3A4 inducer and may lower estradiol exposure. Belzutifan can also reduce the effectiveness of hormonal contraceptives, so efficacy of estrogen therapy may be diminished.
What this interaction means in plain words
Belzutifan and Estradiol 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; Estradiol belongs to Endocrine.
Why it happens
Induction of CYP3A4 by belzutifan increases estradiol metabolism.
What to do
Monitor for loss of estrogen effect and increase the estradiol dose if needed. Patients using hormonal contraception should add a non-hormonal method.
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 Estradiol
- Anastrozole + Estradiol Contraindicated
- Estradiol + Fezolinetant Contraindicated
- Estradiol + Ospemifene Contraindicated
- Antithrombin alfa + Estradiol Major
- Antithrombin iii + Estradiol Major
- Estradiol + Exemestane Major
Other interactions of Belzutifan
Frequently asked questions
Can I take Belzutifan with Estradiol?
MediHelp rates the interaction as moderate. Belzutifan and Estradiol 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 is a CYP3A4 inducer and may lower estradiol exposure. Belzutifan can also reduce the effectiveness of hormonal contraceptives, so efficacy of estrogen therapy may be diminished.
How serious is the interaction between Belzutifan and Estradiol?
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 loss of estrogen effect and increase the estradiol dose if needed. Patients using hormonal contraception should add a non-hormonal method.
What other medicines interact with Estradiol?
MediHelp also lists interactions of Estradiol with, for example, Anastrozole, Fezolinetant, Ospemifene. The full list is on the Estradiol page.
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