Is Lamotrigine safe to take during pregnancy?

Question

Hello doctor,

My wife has epilepsy and is stable on Lamotrigine. We want to start trying for a baby but are unsure about safety. Her neurologist said Lamotrigine is relatively safe during pregnancy, but her obstetrician and gynecologist are worried about folate metabolism and neural tube defects. Should we switch to medications or optimize supplements and plan closely?

Please suggest.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query and can understand your concern.

Thank you for reaching out with such an important and thoughtful question. Lamotrigine is indeed one of the safer anti-seizure medications to continue during pregnancy. It has a relatively low risk of major birth defects compared to many older antiepileptic drugs, and many women successfully carry healthy pregnancies while remaining on it. That said, your obstetrician and gynecologist's concerns about folate metabolism are also valid. Some studies suggest that anti-seizure medications like Lamotrigine may slightly interfere with folate metabolism, which is crucial for preventing neural tube defects.

Here is what is typically recommended in your situation:

1. Do not switch medications unless necessary. Lamotrigine is generally preferred during pregnancy, and changing medication, especially when seizures are well-controlled can pose a much greater risk to both mother and baby.

2. Folic acid supplementation is key. Most guidelines recommend a higher dose of Folic acid for women with epilepsy, usually 4 mg daily (versus 0.4 to 1 mg for the general population), starting at least one month before conception and continuing through the first trimester.

3. Collaborative care is important. It is ideal to have your wife’s neurologist and obstetrician and gynecologist work together to monitor her medication levels (which can fluctuate during pregnancy), seizure control, and fetal development.

4. Close monitoring during pregnancy. Lamotrigine levels often drop significantly during pregnancy due to increased clearance. So regular blood level checks (every four to six weeks) help ensure therapeutic dosing and avoid breakthrough seizures.

In short: No need to switch medications if she is doing well, but optimizing folic acid supplementation, preconception planning, and coordinated care between her doctors will offer the safest path forward.

I hope this answers your query.

Let me know if I need to assist you further.

Thank you.