6 Common Medications Used to Manage Epilepsy

Living with epilepsy or supporting someone who does often involves learning about different treatment options. Medication is the most common and effective way to control seizures. If you’re looking to understand the landscape of epilepsy treatments, this guide provides a clear overview of six widely used medications, explaining how they work and what they are used for.

Understanding Antiepileptic Drugs (AEDs)

Before diving into specific medications, it’s helpful to know what they do. Antiepileptic drugs, often called AEDs or anti-seizure medications, work by calming the excessive electrical activity in the brain that causes seizures. They do not cure epilepsy, but they are highly effective at controlling seizures for the majority of people.

A doctor’s choice of medication depends on several factors, including the type of seizures a person has, their age, their overall health, and potential side effects. The goal is always to find the best medication to stop seizures with the fewest side effects. Below are six common AEDs that have helped millions of people manage their condition.

Important Note: This article is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for diagnosis and treatment.

1. Levetiracetam (Keppra)

Levetiracetam is one of the most frequently prescribed AEDs in the world. It is known for its effectiveness across a wide range of seizure types and is often one of the first medications doctors try.

• How It Works: The exact mechanism of levetiracetam is not fully understood, but it is believed to work differently than many other AEDs. It binds to a specific protein in the brain called SV2A, which is involved in releasing chemical messengers between nerve cells. By modifying this process, it helps prevent the rapid, uncontrolled firing of neurons that leads to a seizure.
• Commonly Used For: It is a broad-spectrum medication, meaning it is effective for various seizure types, including focal onset seizures (previously called partial seizures) and generalized onset seizures, such as tonic-clonic seizures.
• Important Considerations: While many people tolerate it well, some may experience side effects like drowsiness, dizziness, or mood changes, such as irritability or agitation. It’s crucial to discuss any behavioral changes with a doctor.

2. Lamotrigine (Lamictal)

Lamotrigine is another popular broad-spectrum AED that is effective for many different types of seizures. It is often favored because its side effect profile can be milder compared to some older medications.

• How It Works: Lamotrigine works by blocking specific channels in the brain’s nerve cells, known as sodium channels. Seizures often involve the rapid, repetitive opening of these channels. By stabilizing them, lamotrigine reduces the release of glutamate, an excitatory chemical messenger, which helps calm the brain’s electrical activity.
• Commonly Used For: It is approved for treating focal seizures and generalized seizures, including tonic-clonic and absence seizures. It is also used in the treatment of Lennox-Gastaut syndrome, a severe form of childhood epilepsy.
• Important Considerations: The dose of lamotrigine must be increased very slowly over several weeks. This is to minimize the risk of a rare but serious skin rash. Any new rash that develops while taking lamotrigine should be reported to a doctor immediately.

3. Valproic Acid / Sodium Valproate (Depakote)

Valproic acid is an older, highly effective AED that has been used for decades. It remains a vital treatment option, particularly for people with generalized epilepsy syndromes.

• How It Works: Valproic acid has multiple mechanisms of action. Like lamotrigine, it blocks sodium channels. It also increases the levels of a neurotransmitter called GABA (gamma-aminobutyric acid), which has a calming effect on the brain. This combination makes it a powerful anti-seizure medication.
• Commonly Used For: It is very effective for generalized seizures, such as tonic-clonic, myoclonic, and absence seizures. It is also used for focal seizures.
• Important Considerations: Valproic acid can cause side effects like weight gain, hair thinning, and stomach upset. It carries a significant risk of birth defects if taken during pregnancy, so it is generally not recommended for women of childbearing age unless other medications are not effective.

4. Carbamazepine (Tegretol)

Carbamazepine is one of the classic, first-generation AEDs and has been a cornerstone of epilepsy treatment for over 50 years. It is particularly effective for certain types of seizures.

• How It Works: Similar to lamotrigine, carbamazepine’s primary action is to block sodium channels in the brain. This slows down the electrical impulses between nerve cells, preventing them from firing too rapidly and spreading seizure activity.
• Commonly Used For: It is considered a first-choice treatment for focal seizures, both simple and complex. It is also effective for generalized tonic-clonic seizures that begin as focal seizures.
• Important Considerations: This medication can interact with many other drugs, so it’s essential for a doctor to review all medications a person is taking. Blood tests may be required to monitor liver function and blood cell counts.

5. Topiramate (Topamax)

Topiramate is a newer-generation AED that is used for a variety of seizure types. It is also well-known for its use in preventing migraine headaches.

• How It Works: Topiramate has a complex mechanism of action. It blocks sodium channels, enhances the effects of the calming neurotransmitter GABA, and interferes with the excitatory neurotransmitter glutamate. This multi-pronged approach makes it effective against seizures.
• Commonly Used For: It is approved for treating focal seizures and generalized tonic-clonic seizures. It is also used for Lennox-Gastaut syndrome.
• Important Considerations: Common side effects can include drowsiness, dizziness, and cognitive issues like word-finding difficulties or “brain fog.” It can also cause weight loss and carries a small risk of developing kidney stones, so staying well-hydrated is important.

6. Phenytoin (Dilantin)

Phenytoin is one of the oldest and most studied antiepileptic drugs. While newer medications are often preferred today due to fewer side effects, phenytoin remains an important and effective treatment, especially in emergency situations.

• How It Works: Phenytoin works by blocking voltage-gated sodium channels, similar to carbamazepine. By stabilizing these channels, it prevents the spread of seizure activity from one area of the brain to another.
• Commonly Used For: It is used to treat focal seizures and generalized tonic-clonic seizures. It is also administered intravenously in hospitals to stop prolonged seizures (status epilepticus).
• Important Considerations: Long-term use of phenytoin can be associated with side effects such as gum overgrowth (gingival hyperplasia) and a reduction in bone density. Regular blood tests are necessary to ensure the level of the drug in the body remains within a safe and effective range.

Frequently Asked Questions

How does a doctor decide which medication is best? A neurologist considers many factors, including the specific type of seizures, the person’s age and gender, other medical conditions, and potential drug interactions. The goal is to achieve the best seizure control with the fewest side effects, a process that can sometimes involve trying more than one medication.

What are common side effects of these medications? Many AEDs share common side effects, especially when starting the medication or increasing the dose. These often include drowsiness, dizziness, fatigue, and blurred vision. Most side effects are mild and may decrease over time. However, any severe or concerning side effects should be discussed with a doctor immediately.

Can epilepsy be treated without medication? For most people, medication is the primary and most effective treatment. However, other options exist for those whose seizures are not controlled by medication. These can include dietary therapies (like the ketogenic diet), medical devices (like vagus nerve stimulation), and, in some cases, surgery to remove the part of the brain where seizures originate.