Drug interactions
Estradiol + Exemestane
Severity: Major
Estradiol and Exemestane: 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
Estrogens oppose the estrogen-lowering action of exemestane, an aromatase inactivator used in hormone receptor-positive breast cancer. Coadministration may undermine its efficacy.
What this interaction means in plain words
Estradiol and Exemestane 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.
Estradiol belongs to Endocrine; Exemestane belongs to Oncology.
Why it happens
Pharmacodynamic antagonism: exogenous estradiol replaces the estrogen suppressed by exemestane.
What to do
Avoid concurrent systemic estrogen therapy with exemestane and use non-hormonal options for menopausal symptoms.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Estradiol and Exemestane, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Estradiol
- Anastrozole + Estradiol Contraindicated
- Estradiol + Fezolinetant Contraindicated
- Estradiol + Ospemifene Contraindicated
- Antithrombin alfa + Estradiol Major
- Antithrombin iii + Estradiol Major
- Estradiol + Fosphenytoin Major
Other interactions of Exemestane
Frequently asked questions
Can I take Estradiol with Exemestane?
MediHelp rates the interaction as major. Estradiol and Exemestane 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. Estrogens oppose the estrogen-lowering action of exemestane, an aromatase inactivator used in hormone receptor-positive breast cancer. Coadministration may undermine its efficacy.
How serious is the interaction between Estradiol and Exemestane?
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 concurrent systemic estrogen therapy with exemestane and use non-hormonal options for menopausal symptoms.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
