Drug interactions
Dienogest / estradiol valerate + Griseofulvin
Severity: Major
Dienogest / estradiol valerate and Griseofulvin: 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
Griseofulvin may lower estradiol and dienogest concentrations through enzyme induction, and it has been associated with contraceptive failure and breakthrough bleeding. Reduced hormone exposure may compromise contraceptive reliability.
What this interaction means in plain words
Dienogest / estradiol valerate and Griseofulvin 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.
Why it happens
Induction of CYP3A4 by griseofulvin increases metabolism of estradiol and dienogest.
What to do
Advise an additional non-hormonal contraceptive method during griseofulvin treatment and for about 28 days after stopping it.
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 Dienogest / estradiol valerate and Griseofulvin, 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 Griseofulvin
Frequently asked questions
Can I take Dienogest / estradiol valerate with Griseofulvin?
MediHelp rates the interaction as major. Dienogest / estradiol valerate and Griseofulvin 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. Griseofulvin may lower estradiol and dienogest concentrations through enzyme induction, and it has been associated with contraceptive failure and breakthrough bleeding. Reduced hormone exposure may compromise contraceptive reliability.
How serious is the interaction between Dienogest / estradiol valerate and Griseofulvin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise an additional non-hormonal contraceptive method during griseofulvin treatment and for about 28 days after stopping it.
What other medicines interact with Griseofulvin?
MediHelp also lists interactions of Griseofulvin with, for example, Cyclosporine, Cyclosporin, Desogestrel-ethinyl estradiol. The full list is on the Griseofulvin 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.
