Drug interactions
Dienogest / estradiol valerate + Topiramate
Severity: Moderate
Dienogest / estradiol valerate and Topiramate: 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
Topiramate, particularly at doses of 200 mg/day or more, can lower ethinyl estradiol exposure and may reduce the reliability of hormonal contraception. Breakthrough bleeding and contraceptive failure are possible. Data for estradiol valerate specifically are limited and the effect is extrapolated.
What this interaction means in plain words
Dienogest / estradiol valerate and Topiramate 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.
Why it happens
Topiramate induces hepatic enzymes (including CYP3A4) in a dose-dependent manner, which may increase the clearance of the estrogen and progestin.
What to do
If used for contraception, add a barrier back-up method or choose a non-hormonal or non-enzyme-dependent method such as an intrauterine device. Report breakthrough bleeding, which may signal reduced hormone exposure.
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 Topiramate
Frequently asked questions
Can I take Dienogest / estradiol valerate with Topiramate?
MediHelp rates the interaction as moderate. Dienogest / estradiol valerate and Topiramate 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. Topiramate, particularly at doses of 200 mg/day or more, can lower ethinyl estradiol exposure and may reduce the reliability of hormonal contraception. Breakthrough bleeding and contraceptive failure are possible. Data for estradiol valerate specifically are limited and the effect is extrapolated.
How serious is the interaction between Dienogest / estradiol valerate and Topiramate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: If used for contraception, add a barrier back-up method or choose a non-hormonal or non-enzyme-dependent method such as an intrauterine device. Report breakthrough bleeding, which may signal reduced hormone exposure.
What other medicines interact with Topiramate?
MediHelp also lists interactions of Topiramate with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Topiramate page.
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