Drug interactions
Bazedoxifene-conjugated estrogens + Rifapentine
Severity: Moderate
Bazedoxifene-conjugated estrogens and Rifapentine: 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
Rifapentine induces hepatic and intestinal metabolism and can substantially reduce exposure to estrogens and bazedoxifene. This may cause loss of symptom control and reduced endometrial protection.
What this interaction means in plain words
Bazedoxifene-conjugated estrogens and Rifapentine 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.
Bazedoxifene-conjugated estrogens belongs to Endocrine; Rifapentine belongs to Anti Bacterial.
Why it happens
Rifapentine induces CYP3A4 and glucuronidation, increasing clearance of the estrogen and bazedoxifene components.
What to do
Monitor for recurrent vasomotor symptoms and abnormal bleeding during and after rifapentine therapy; consider an alternative regimen if the combination persists long-term.
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 Bazedoxifene-conjugated estrogens
- Anastrozole + Bazedoxifene-conjugated estrogens Contraindicated
- Bazedoxifene-conjugated estrogens + Ospemifene Contraindicated
- Antithrombin alfa + Bazedoxifene-conjugated estrogens Major
- Antithrombin iii + Bazedoxifene-conjugated estrogens Major
- Bazedoxifene-conjugated estrogens + Bemiparin Major
- Bazedoxifene-conjugated estrogens + Carbamazepine Major
Other interactions of Rifapentine
- Ledipasvir-sofosbuvir + Rifapentine Contraindicated
- Lorlatinib + Rifapentine Contraindicated
- Lurasidone + Rifapentine Contraindicated
- Ranolazine + Rifapentine Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir Contraindicated
- Rifapentine + Sofosbuvir-velpatasvir-voxilaprevir Contraindicated
Frequently asked questions
Can I take Bazedoxifene-conjugated estrogens with Rifapentine?
MediHelp rates the interaction as moderate. Bazedoxifene-conjugated estrogens and Rifapentine 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. Rifapentine induces hepatic and intestinal metabolism and can substantially reduce exposure to estrogens and bazedoxifene. This may cause loss of symptom control and reduced endometrial protection.
How serious is the interaction between Bazedoxifene-conjugated estrogens and Rifapentine?
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 recurrent vasomotor symptoms and abnormal bleeding during and after rifapentine therapy; consider an alternative regimen if the combination persists long-term.
What other medicines interact with Bazedoxifene-conjugated estrogens?
MediHelp also lists interactions of Bazedoxifene-conjugated estrogens with, for example, Anastrozole, Ospemifene, Antithrombin alfa. The full list is on the Bazedoxifene-conjugated estrogens page.
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