Drug interactions
Lamotrigine + Segesterone / ethinyl estradiol
Severity: Moderate
Lamotrigine and Segesterone / ethinyl estradiol: 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
The ethinylestradiol in this vaginal ring is expected to lower lamotrigine concentrations, though systemic exposure is lower than with oral products. This may reduce seizure control.
What this interaction means in plain words
Lamotrigine and Segesterone / ethinyl estradiol 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
Ethinylestradiol induces lamotrigine glucuronidation.
What to do
Monitor seizure control and adjust lamotrigine on starting or stopping the ring. Consider lamotrigine levels if control changes.
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 Lamotrigine
Frequently asked questions
Can I take Lamotrigine with Segesterone / ethinyl estradiol?
MediHelp rates the interaction as moderate. Lamotrigine and Segesterone / ethinyl estradiol 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. The ethinylestradiol in this vaginal ring is expected to lower lamotrigine concentrations, though systemic exposure is lower than with oral products. This may reduce seizure control.
How serious is the interaction between Lamotrigine and Segesterone / ethinyl estradiol?
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 seizure control and adjust lamotrigine on starting or stopping the ring. Consider lamotrigine levels if control changes.
What other medicines interact with Lamotrigine?
MediHelp also lists interactions of Lamotrigine with, for example, Desogestrel-ethinyl estradiol, Divalproex, Dofetilide. The full list is on the Lamotrigine page.
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