Drug interactions
Estradiol + Rufinamide
Severity: Minor
Estradiol and Rufinamide: minor 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
Rufinamide is a weak CYP3A4 inducer and may modestly lower exposure to estradiol. Reduced hormone effect is more of a concern with contraceptive doses than with replacement therapy.
What this interaction means in plain words
Estradiol and Rufinamide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Estradiol belongs to Endocrine; Rufinamide belongs to Central Nervous System.
Why it happens
Weak induction of CYP3A4 by rufinamide may increase estradiol metabolism.
What to do
Be aware of possible reduced efficacy and review if breakthrough bleeding or recurrent symptoms occur. Adjust therapy only if clinically needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Rufinamide
- Carbamazepine + Rufinamide Moderate
- Desogestrel-ethinyl estradiol + Rufinamide Moderate
- Dronedarone + Rufinamide Moderate
- Esketamine + Rufinamide Moderate
- Ethinyl estradiol-drospirenone + Rufinamide Moderate
- Ethinyl estradiol-levonorgestrel + Rufinamide Moderate
Frequently asked questions
Can I take Estradiol with Rufinamide?
MediHelp rates the interaction as minor. Estradiol and Rufinamide have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Rufinamide is a weak CYP3A4 inducer and may modestly lower exposure to estradiol. Reduced hormone effect is more of a concern with contraceptive doses than with replacement therapy.
How serious is the interaction between Estradiol and Rufinamide?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Be aware of possible reduced efficacy and review if breakthrough bleeding or recurrent symptoms occur. Adjust therapy only if clinically needed.
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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