Partial seizures are episodes of abnormal electrical activity that begin in a specific area of the brain, affecting only one side at a time. Treatment options range from medications that help control seizure activity to surgical approaches for those who don’t respond to drugs, with the goal of reducing seizure frequency, preventing complications, and helping people maintain the best possible quality of life.

Understanding Treatment Goals for Partial Seizures

When someone experiences partial seizures, the primary goals of treatment center on controlling the unusual electrical activity in the brain and reducing the frequency of seizure episodes. The treatment approach is highly personalized, taking into account how often seizures occur, their severity, the patient’s age, overall health status, and medical history. For many people living with this condition, proper treatment can significantly lower the number of seizures they experience, and in some fortunate cases, people may not have any more seizures for the rest of their lives.^[1]

Treatment decisions are never one-size-fits-all. They depend on whether a person has simple partial seizures (which don’t affect awareness) or complex partial seizures (which do affect awareness and consciousness). Simple partial seizures, also known as auras, involve a small portion of the brain and allow the person to remain fully aware during the episode. Complex partial seizures, on the other hand, start in one area and can travel to another, causing a person to appear dazed or unresponsive, sometimes lasting between 30 seconds and 2 minutes.^[1][11]

Medical professionals follow established treatment guidelines from organizations like the International League Against Epilepsy, which has developed classification systems to help doctors identify the type of seizure and choose the most appropriate treatment strategy. Partial seizures and generalized seizures (which affect both sides of the brain) are often treated differently, which is why accurate diagnosis is so crucial before beginning any treatment plan.^[2]

Standard Treatment Approaches

Medication as First-Line Treatment

The cornerstone of treatment for partial seizures is anti-seizure medication, also called anti-epileptic drugs. These medications work by calming down the excessive electrical activity in the brain that causes seizures. For newly diagnosed patients with focal onset seizures (another term for partial seizures), several medications are considered effective as first-line treatments.^[3]

Among the most commonly recommended medications are lamotrigine and levetiracetam, both of which are offered as primary monotherapy options for focal onset seizures in children and adults. If neither of these medications is available, carbamazepine serves as an alternate first-line treatment. The World Health Organization recommends these medications based on their proven effectiveness and safety profiles. If the first medication tried doesn’t successfully control seizures, doctors typically recommend trying an alternative first-line medication before moving to other options.^[15]

Other medications that are widely considered effective for controlling partial seizures include phenobarbital, phenytoin, gabapentin, and topiramate. Each of these drugs works slightly differently in the brain, and what works well for one person may not work as well for another. This is why finding the right medication often involves some trial and adjustment.^[1][14]

For complex partial seizures specifically, medications like levireacetam, lamotrigine (Lamictal), lacosamide, zonegram, and Depakote are commonly prescribed. Lamotrigine is often preferred because it tends to have fewer side effects compared to some other options, though it may be slightly less effective in some cases. Many children who begin having seizures by age 9 may grow out of the condition by the time they reach 18 years old.^[11]

Understanding Medication Side Effects

While anti-seizure medications can be very helpful, they do come with potential side effects that patients and doctors must consider. Among patients taking their first anti-seizure medication, up to 30 percent may experience adverse effects. This percentage can climb to as high as 90 percent in people taking multiple medications at once (a practice called polytherapy).^[9]

The most common side effects include dizziness, drowsiness, and slowed thinking or cognition. These effects may depend on the dose of medication being taken. Some medications, particularly phenytoin, carbamazepine, and lamotrigine, can also cause skin rashes and, in rare cases, severe reactions like Stevens-Johnson syndrome. Other medications may lead to changes in body weight—gabapentin and valproate are associated with weight gain, while topiramate and zonisamide tend to cause weight loss.^[9]

For women who are pregnant or of childbearing age, the choice of medication requires special consideration due to the potential for birth defects and developmental problems in babies. Lamotrigine and levetiracetam have the lowest risk profile for congenital malformations. In contrast, valproic acid (sodium valproate) is not recommended for women and girls of childbearing potential because it carries a high risk of birth defects and neurodevelopmental disorders in children who were exposed to it in the womb.^[9][15]

Treatment Duration and Monitoring

How long someone needs to stay on anti-seizure medication varies considerably from person to person. For those who have been seizure-free for at least two years while on treatment, there’s an important decision to consider: whether to continue medication or attempt withdrawal. Research shows that among people with partial or generalized epilepsy who try to stop their medication after two seizure-free years, almost 60 percent will remain seizure-free. By comparison, almost 80 percent who continue their medication will remain seizure-free.^[14]

If a patient is free of seizures for two years, their doctor may slowly reduce the amount of medication they’re taking until, in some cases, no medication is needed at all. This process must be done gradually and under close medical supervision to minimize the risk of seizures returning.^[11]

When Medications Don’t Work Alone

For people whose seizures don’t respond adequately to a single medication, doctors may recommend adding a second medication. This approach, called adjunctive or add-on therapy, can be beneficial. If the first medication fails because of side effects, doctors typically replace it with a different single medication. If the first medication was well-tolerated but only partially effective, adding a second drug may be preferred.^[9]

When combining medications, doctors try to choose drugs with different mechanisms of action, as using medications that work in redundant ways may increase the likelihood of side effects without improving seizure control. Research has shown that adding second-line drugs to usual treatment does reduce seizure frequency in people with drug-resistant partial epilepsy, though it also increases adverse effects such as dizziness and drowsiness.^[14]

If monotherapy is unsuccessful and even combination drug therapy doesn’t adequately control seizures, prompt referral to a specialist is recommended to explore other treatment options, which may include surgery or dietary modifications.^[15]

Surgery for Drug-Resistant Seizures

Surgery becomes an option when medications cannot control seizures. There is broad consensus among medical professionals that certain surgical procedures, particularly temporal lobectomy or amygdalohippocampectomy, can improve seizure control and quality of life in people with drug-resistant temporal lobe epilepsy, a specific form of partial epilepsy. These surgeries involve removing the part of the brain where seizures originate.^[14]

However, surgery is not without risks. These procedures can cause neurologic adverse effects, which is why they are typically reserved for people who have not responded to multiple medication trials. Another surgical option called lesionectomy may be considered for some patients with drug-resistant temporal lobe epilepsy, though there is less certainty about its effectiveness.^[14]

The staff at specialized epilepsy programs work with each patient individually to determine the best treatment approach, whether that involves medications, surgery, or a combination of strategies.^[1]

Lifestyle and Dietary Modifications

Beyond medications and surgery, certain lifestyle changes and dietary approaches can play an important role in seizure management. One such approach is the ketogenic diet, a special high-fat, low-carbohydrate eating plan that has shown promise in controlling certain types of epilepsy. This diet is used most often for children who have not responded well to medications, and it may also be effective for controlling certain types of epilepsy in adults.^[1][11][12]

Other lifestyle modifications that can help reduce seizure frequency include getting plenty of sleep and avoiding known seizure triggers. Some people find that certain stimuli, such as flickering lights, can trigger their seizures, so avoiding these exposures is recommended. Regular, moderate exercise like walking and biking can also support overall health, though people should make sure their seizures are under control before starting any exercise program to decrease the risk of injury.^[1][16]

Vagus Nerve Stimulation

For some people with drug-resistant partial seizures, a device called a vagus nerve stimulator may be an option. High-level vagus nerve stimulation has been shown to reduce seizure frequency in people whose seizures don’t respond adequately to medications. However, this approach can cause side effects including hoarseness and difficulty breathing (dyspnea), and the long-term effects are not yet fully understood.^[14]

Emerging Treatments in Clinical Research

While the sources provided do not contain detailed information about specific drugs currently being tested in clinical trials for partial seizures, it’s worth noting that research into new treatments continues. Approximately two-thirds of people with epilepsy will respond to either single-drug therapy or combination therapy with currently available medications. However, for the remaining one-third whose seizures are drug-resistant, ongoing research is crucial.^[9]

Second-line medications for partial seizures continue to be studied and refined. For focal onset seizures, lacosamide is offered as a second-line monotherapy option if none of the first-line medicines prove effective. Research continues to evaluate different dosing schedules, drug interactions, available formulations, and cost-effectiveness of various anti-seizure medications.^[9][15]

Clinical trials for new anti-epileptic drugs have been conducted in children, though relatively few placebo-controlled or comparative trials of first-generation and newer anti-epileptic drugs have been performed specifically in pediatric populations. This reflects the ethical challenges of conducting placebo-controlled trials in children with epilepsy, as well as the fact that regulatory guidelines for testing epilepsy drugs in children were only established relatively recently.^[12]

Most common treatment methods

• Anti-seizure medications (first-line)
  • Lamotrigine and levetiracetam are recommended as primary treatment options for focal onset seizures in both children and adults
  • Carbamazepine serves as an alternate first-line choice when lamotrigine or levetiracetam are not available
  • Other effective medications include phenobarbital, phenytoin, gabapentin, and topiramate
  • Treatment is tailored based on seizure type, frequency, severity, patient age, overall health, and medical history
• Anti-seizure medications (second-line and adjunctive)
  • Lacosamide is offered as second-line monotherapy for focal onset seizures when first-line options fail
  • Adding second-line drugs to existing treatment can reduce seizure frequency in drug-resistant cases
  • Combination therapy may increase side effects including dizziness and drowsiness
  • Doctors prefer combining medications with different mechanisms of action
• Surgical interventions
  • Temporal lobectomy or amygdalohippocampectomy can improve seizure control and quality of life in drug-resistant temporal lobe epilepsy
  • Surgery is considered when medications cannot adequately control seizures
  • Procedures can cause neurologic adverse effects and are reserved for medication-resistant cases
  • Lesionectomy may be considered for some patients with drug-resistant temporal lobe epilepsy
• Dietary therapy
  • Ketogenic diet is a special high-fat, low-carbohydrate eating plan used for seizure control
  • Most often used in children who haven’t responded well to medications
  • May also be effective for certain types of epilepsy in adults
• Device-based therapy
  • Vagus nerve stimulation can reduce seizure frequency in drug-resistant partial seizures
  • May cause side effects including hoarseness and breathing difficulties
  • Long-term effects are not yet fully understood
• Lifestyle modifications
  • Getting plenty of sleep helps reduce seizure risk
  • Avoiding known triggers such as flickering lights
  • Regular, moderate exercise like walking and biking supports overall health
  • Exercise programs should only be started when seizures are under control