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Symptom guide · Pregnancy Smart

Epilepsy during pregnancy: what should your plan cover?

Assigned clinical reviewerMichael Yuzefovich· MD, FACOGDraft · pending clinical reviewUpdated

By trimester

Weeks 1–13

1st trimester

Before or early in pregnancy, review the seizure history, exact medicines, baseline information, and folic acid plan.

Weeks 14–27

2nd trimester

During pregnancy, follow the agreed symptom and drug-level monitoring schedule and report medication-use problems.

Weeks 28–birth

3rd trimester

Before birth, confirm hospital medicine access, the emergency plan, and postpartum dose and follow-up arrangements.

What does the evidence show for epilepsy?

  • Epilepsy involves recurring seizures, which do not all look alike. Some affect awareness or sensation, while others cause major movements or loss of consciousness. Describe your usual events and any recent change so the obstetric team understands the condition and the emergency plan. 1
  • The 2024 AAN, AES, and SMFM guideline emphasizes optimizing seizure control and fetal outcomes before conception when possible. Once pregnancy has begun, removing an effective medicine can carry significant risks. Medicine selection depends on the epilepsy syndrome, response, and pregnancy evidence, with particular concerns around valproate when alternatives are feasible. 2
  • The prospective MONEAD study documented lower dose-normalized blood concentrations of several antiseizure medicines during pregnancy. These were maternal concentration measurements, not a measure of fetal exposure or a universal dose-increase formula. Individual monitoring can help guide specialist adjustments. 3
  • Folic acid supplementation should be addressed before and during pregnancy for people using antiseizure medicines. Review the prenatal vitamin, prescribed folic acid, and total daily intake with the clinician. Supplementation does not replace medication review or guarantee an outcome. 2
  • CDC advises calling 911 when a person having a seizure is pregnant. Bystanders should help keep the area clear, stay nearby, and avoid restraining the person or putting anything in the mouth. Share the known epilepsy history and medicines with emergency responders. 4

Questions to discuss with your care team

Decision pointWhat to clarify
Seizure patternWhat are your usual events, triggers, and recent changes?
Medicine planWho directs dose changes and provides missed-dose or vomiting instructions?
MonitoringWhich medicines need blood-level checks, and what baseline is used?
Birth and recoveryHow will doses, emergency contacts, and postpartum review stay organized?

When should I call my provider about epilepsy?

Call 911 for a seizure during pregnancy, including a first seizure or an event different from the usual pattern.,Repeated or prolonged seizures, injury, breathing difficulty, or failure to recover awareness need emergency assistance.,Severe headache or vision changes also warrant urgent obstetric assessment; a history of epilepsy should not obscure another cause. Trust your read on your own body. If something feels off beyond the list above, please consult your healthcare provider rather than waiting it out.

Frequently asked questions

Should I stop my medicine immediately when a test is positive?

No. Contact the prescriber promptly for an individualized review while following the existing plan. Suddenly withdrawing a medicine that controls convulsive seizures can put both you and the pregnancy at risk.

Can the lowest-risk medicine simply be substituted for my current one?

Not automatically. The medicine must fit your seizure type and be effective for you. Changes are ideally planned before conception, but an established pregnancy requires a careful assessment of both switching and continuing.

Why might the same dose produce a different blood level?

Pregnancy can alter how the body handles particular medicines. MONEAD found concentration changes that differed across drugs. The clinician may compare levels and seizure history with an individual baseline when deciding on adjustments.

Does a lower blood level tell us how much medicine reaches the baby?

No. Maternal concentration data answer a different question from fetal exposure or developmental risk. Ask what a blood test is intended to guide, and avoid translating its result into an unsupported prediction about the baby.

Should I ask about folic acid even if I take a prenatal vitamin?

Yes. Review the product and total intake with the clinician so the plan fits the guideline and your history. Do not add multiple high-dose products without checking the combined amount.

What should my partner do if I have a seizure while pregnant?

Call 911, stay with you, clear nearby hazards, and follow the dispatcher's instructions. If you are lying down, gentle positioning onto your side can help keep the airway clear. Nothing should be placed in your mouth.

Will a pregnancy dose automatically remain right after delivery?

Not necessarily. Medicine handling can change again after birth. Arrange a postpartum level and dose-review plan in advance rather than keeping a late-pregnancy increase indefinitely or reducing it on your own.

What if I take valproate and have just found out I am pregnant?

Contact neurology and obstetrics promptly for specialist review. The guideline identifies important fetal risks and favors alternatives when clinically feasible, but you should not abruptly stop an effective antiseizure regimen without a supervised plan.

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References

  1. Epilepsy

    MedlinePlus · https://medlineplus.gov/epilepsy.html

  3. Antiseizure Medication Concentrations During Pregnancy

    PubMed Central · https://pmc.ncbi.nlm.nih.gov/articles/PMC8845026/

  4. First Aid for Seizures

    CDC · https://www.cdc.gov/epilepsy/first-aid-for-seizures/index.html

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.