Drug interactions
Estradiol + Ospemifene
Severity: Contraindicated
Estradiol and Ospemifene: contraindicated 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
Ospemifene is an estrogen agonist/antagonist and should not be given with estrogens. Combined use adds to the risk of endometrial and thromboembolic effects and has not been shown to be safe.
What this interaction means in plain words
Estradiol and Ospemifene are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Estradiol belongs to Endocrine; Ospemifene belongs to Endocrine.
Why it happens
Additive estrogenic receptor activity with overlapping risks of endometrial stimulation and venous thromboembolism.
What to do
Do not combine; use either ospemifene or estrogen therapy for dyspareunia.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Estradiol
- Anastrozole + Estradiol Contraindicated
- Estradiol + Fezolinetant Contraindicated
- Antithrombin alfa + Estradiol Major
- Antithrombin iii + Estradiol Major
- Estradiol + Exemestane Major
- Estradiol + Fosphenytoin Major
Other interactions of Ospemifene
- Bazedoxifene-conjugated estrogens + Ospemifene Contraindicated
- Clomiphene + Ospemifene Major
- Fluconazole + Ospemifene Major
- Ketoconazole + Ospemifene Major
- Ospemifene + Raloxifene Major
- Ospemifene + Rifampicin Major
Frequently asked questions
Can I take Estradiol with Ospemifene?
MediHelp rates the interaction as contraindicated. Estradiol and Ospemifene are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Ospemifene is an estrogen agonist/antagonist and should not be given with estrogens. Combined use adds to the risk of endometrial and thromboembolic effects and has not been shown to be safe.
How serious is the interaction between Estradiol and Ospemifene?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not combine; use either ospemifene or estrogen therapy for dyspareunia.
What other medicines interact with Estradiol?
MediHelp also lists interactions of Estradiol with, for example, Anastrozole, Fezolinetant, Antithrombin alfa. The full list is on the Estradiol page.
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