Drug interactions
Belzutifan + Ethinyl estradiol-drospirenone
Severity: Major
Belzutifan and Ethinyl estradiol-drospirenone: 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
Belzutifan can reduce exposure to hormonal contraceptives, which may cause contraceptive failure or breakthrough bleeding. This matters because belzutifan can cause fetal harm.
What this interaction means in plain words
Belzutifan and Ethinyl estradiol-drospirenone 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.
Belzutifan belongs to Miscellaneous; Ethinyl estradiol-drospirenone belongs to Endocrine.
Why it happens
Belzutifan induces CYP3A4, increasing metabolism of ethinyl estradiol and drospirenone.
What to do
Use an effective non-hormonal contraceptive method during treatment and for the period specified in labeling after the last dose. Do not rely on hormonal contraception alone.
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 Belzutifan and Ethinyl estradiol-drospirenone, 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 Ethinyl estradiol-drospirenone
- Ethinyl estradiol-drospirenone + Fezolinetant Contraindicated
- Ethinyl estradiol-drospirenone + Ombitasvir / paritaprevir / ritonavir Contraindicated
- Ethinyl estradiol-drospirenone + Ombitasvir / paritaprevir / ritonavir and dasabuvir Contraindicated
- Ethinyl estradiol-drospirenone + Tranexamic acid Contraindicated
- Aminocaproic acid + Ethinyl estradiol-drospirenone Major
- Amobarbital + Ethinyl estradiol-drospirenone Major
Other interactions of Belzutifan
Frequently asked questions
Can I take Belzutifan with Ethinyl estradiol-drospirenone?
MediHelp rates the interaction as major. Belzutifan and Ethinyl estradiol-drospirenone 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. Belzutifan can reduce exposure to hormonal contraceptives, which may cause contraceptive failure or breakthrough bleeding. This matters because belzutifan can cause fetal harm.
How serious is the interaction between Belzutifan and Ethinyl estradiol-drospirenone?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use an effective non-hormonal contraceptive method during treatment and for the period specified in labeling after the last dose. Do not rely on hormonal contraception alone.
What other medicines interact with Ethinyl estradiol-drospirenone?
MediHelp also lists interactions of Ethinyl estradiol-drospirenone with, for example, Fezolinetant, Ombitasvir / paritaprevir / ritonavir, Ombitasvir / paritaprevir / ritonavir and dasabuvir. The full list is on the Ethinyl estradiol-drospirenone 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.
