A Guide to 6 Common Epilepsy Medications

Finding the right information about epilepsy treatment can feel overwhelming, but understanding the options is a crucial first step. If you’re looking to learn about the medications commonly used to manage seizures, you’ve come to the right place. This guide provides a clear overview of six widely prescribed antiepileptic drugs (AEDs).

Important Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. The information provided is not a substitute for professional medical consultation, diagnosis, or treatment. Always seek the advice of your physician or another qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read here.

Understanding How Epilepsy Medications Work

Epilepsy is characterized by abnormal electrical activity in the brain, leading to seizures. Antiepileptic drugs, also known as anticonvulsants, work in various ways to stabilize this electrical activity and prevent seizures from occurring. The goal of treatment is to find the medication that provides the best seizure control with the fewest side effects.

A doctor considers several factors when choosing a medication, including the type of seizures a person has, their age, their overall health, other medications they might be taking, and potential side effects. Here are six medications commonly used in the treatment of epilepsy.

1. Levetiracetam (Keppra)

Levetiracetam is one of the most frequently prescribed AEDs today, known for its effectiveness across different seizure types and generally favorable side-effect profile. It is often one of the first medications doctors try for newly diagnosed epilepsy.

How it Works: The exact mechanism of levetiracetam is not fully understood, but it is believed to bind to a specific protein in the brain (SV2A) involved in the release of neurotransmitters. By modifying this process, it helps prevent the excessive, synchronized firing of neurons that leads to a seizure.
Commonly Used For: It is a broad-spectrum medication used to treat focal onset seizures (also called partial seizures), generalized tonic-clonic seizures, and myoclonic seizures.
Potential Side Effects: While many people tolerate it well, common side effects can include drowsiness, dizziness, and weakness. Some individuals may experience mood changes, such as irritability or agitation.

2. Lamotrigine (Lamictal)

Lamotrigine is another popular broad-spectrum AED that is also used as a mood stabilizer in bipolar disorder. It is known for being effective and is often well-tolerated, though it requires a slow and careful dose increase to minimize the risk of a serious rash.

How it Works: Lamotrigine works primarily by blocking sodium channels in brain cells. These channels are crucial for the rapid firing of neurons. By slowing them down, lamotrigine reduces the brain’s excitability and makes seizures less likely to happen.
Commonly Used For: It is effective for treating focal onset seizures and generalized seizures, including tonic-clonic and absence seizures.
Potential Side Effects: Common side effects include dizziness, headache, blurred or double vision, and nausea. A very rare but serious side effect is a severe skin rash (Stevens-Johnson syndrome), which is why the dose must be increased very slowly under a doctor’s supervision.

3. Valproic Acid (Depakote, Depakene)

Valproic acid is an older, powerful, and very effective broad-spectrum AED. It has been used for decades to treat a wide variety of seizure types and is also prescribed for migraines and bipolar disorder.

How it Works: Valproic acid has multiple mechanisms of action. It blocks sodium channels like lamotrigine, but it also increases the levels of a calming neurotransmitter in the brain called GABA (gamma-aminobutyric acid). This combination makes it highly effective at suppressing seizure activity.
Commonly Used For: It is used for nearly all seizure types, including generalized, focal, absence, and myoclonic seizures.
Potential Side Effects: Side effects can include nausea, weight gain, hair thinning, and tremors. It can also cause more serious issues, including liver problems and pancreatitis, so regular blood monitoring is often required. Due to potential risks in pregnancy, it is prescribed with caution to women of childbearing age.

4. Carbamazepine (Tegretol, Carbatrol)

Carbamazepine is one of the classic, first-generation AEDs that remains a first-line treatment for certain types of seizures. It has been a reliable option for many people for decades.

How it Works: Similar to lamotrigine, carbamazepine’s primary action is to block sodium channels, which slows down the rate at which neurons can fire. This effect is particularly useful for stopping seizures that start in one specific area of the brain.
Commonly Used For: It is highly effective for focal onset seizures and generalized tonic-clonic seizures. It is not typically used for absence or myoclonic seizures, as it can sometimes make them worse.
Potential Side Effects: Common side effects include dizziness, drowsiness, unsteadiness, and nausea. It can affect blood cell counts and liver function, so doctors usually order periodic blood tests to monitor for any issues.

5. Topiramate (Topamax)

Topiramate is a newer-generation AED that is also widely used for preventing migraine headaches. It has several different mechanisms of action, making it effective for various seizure types.

How it Works: Topiramate works in multiple ways. It blocks sodium channels, enhances the effects of the calming neurotransmitter GABA, and interferes with the excitatory neurotransmitter glutamate. This multi-pronged approach helps to quiet excessive brain activity.
Commonly Used For: It is approved for treating focal onset seizures and generalized tonic-clonic seizures.
Potential Side Effects: Side effects can be more pronounced for some people and may include drowsiness, dizziness, and difficulty with word-finding or concentration (sometimes referred to as “brain fog”). It can also cause tingling in the hands and feet and an increased risk of kidney stones.

6. Gabapentin (Neurontin)

While originally developed as an AED, gabapentin is now more commonly prescribed to treat nerve pain. However, it is still used as an add-on therapy for managing certain types of epilepsy.

How it Works: Despite its name, gabapentin does not directly act on GABA receptors. Its exact antiepileptic mechanism is complex, but it is thought to reduce the release of excitatory neurotransmitters by interacting with calcium channels in the brain.
Commonly Used For: It is used as an adjunctive (add-on) therapy for treating focal onset seizures in adults and children. It is generally not used as a primary medication for epilepsy.
Potential Side Effects: The most common side effects are drowsiness, dizziness, and fatigue. It is generally considered to have a mild side-effect profile compared to some other AEDs.

Frequently Asked Questions

What is the goal of epilepsy medication? The primary goal is to achieve “no seizures, no side effects.” This means finding a medication that completely controls a person’s seizures without causing intolerable side effects that impact their quality of life.

Do these medications cure epilepsy? Antiepileptic drugs do not cure epilepsy. They manage the condition by controlling and preventing seizures. For most people, medication must be taken consistently every day to remain effective.

What should I do if I miss a dose? You should follow the specific instructions provided by your doctor or pharmacist. Generally, you may be told to take the dose as soon as you remember, unless it is almost time for your next scheduled dose. Never double up on doses to make up for a missed one without consulting your healthcare provider.