Treating Childhood Absence Epilepsy: Medications and Options

Deciding on a treatment plan for Childhood Absence Epilepsy (CAE) can feel overwhelming, but the goals of therapy are very clear: to stop the seizures entirely and to help your child focus and learn without the interference of “micro-interruptions” in their brain activity ^[1][2].

The good news is that CAE is highly responsive to medication. For most children, the path to seizure freedom involves one of a few well-established medications ^[3][4].

The First-Line Options

Two medications are considered the “gold standard” for treating CAE because they are significantly more effective than other options.

1. Ethosuximide (Zarontin)

Ethosuximide is typically the preferred initial therapy for CAE ^[3][4].

• Why it’s chosen: It is highly effective at stopping absence seizures and has a more favorable behavioral profile than other drugs. Children taking ethosuximide tend to have fewer issues with attention, irritability, or mood changes ^[5][6].
• Best for: Most children with classic CAE.

2. Valproic Acid (Depakote)

Valproic acid is just as effective as ethosuximide at stopping absence seizures ^[3].

• When it’s chosen: Doctors often choose valproic acid if a child has a history of generalized tonic-clonic seizures (formerly called “grand mal” seizures) in addition to their absence spells. While ethosuximide only treats absence seizures, valproic acid treats a wider range of seizure types ^[7].
• Considerations: It is associated with a higher risk of behavioral side effects and weight gain, and it requires more frequent blood monitoring ^[5][6].

A Note on Lamotrigine (Lamictal)

While lamotrigine is often used in other types of epilepsy, research has shown it is significantly less effective than ethosuximide or valproic acid for treating CAE ^[3][4]. It is generally only used if the first two medications cannot be tolerated ^[8].

When the First Medication Doesn’t Work

While the majority of children find success quickly, about 20% to 30% of patients have pharmacoresistant CAE, meaning their seizures do not stop with the first two medications ^[9].

If your child falls into this category, the next steps often involve:

• Switching Monotherapy: If ethosuximide didn’t work, the doctor may switch the child entirely to valproic acid, or vice-versa ^[8].
• Combination Therapy: Using two medications at once.
• Add-on Therapies: In some cases, newer medications like lacosamide or perampanel may be added to help control stubborn seizures, although these are typically used after the standard treatments have been tried ^[10][11].

Treatment Goals and Success

The primary goal is seizure freedom. Studies show that children who achieve seizure freedom through prompt treatment have better long-term academic and social outcomes ^[1][2].

It is important to remember that treating CAE is often a marathon, not a sprint. It can take time to find the right dose that stops the seizures while minimizing side effects. Open communication with your pediatric neurologist about your child’s behavior, mood, and “staring spells” at home is the best way to ensure the treatment plan is working as intended.