Can Epilepsy Cause Mood Swings and What to Do?

Epilepsy can and frequently does cause mood swings, through mechanisms that go well beyond the psychological stress of living with seizures. The relationship between epilepsy and mood disorders is bidirectional: the same brain chemistry changes that drive seizures also affect emotional regulation, and mood disorders in turn can worsen seizure control. Roughly half of people with epilepsy experience clinically meaningful mood symptoms at some point, yet these symptoms are often overlooked or attributed to other causes. Understanding where these mood swings come from is the first step toward managing them effectively.

How Seizures Directly Affect Your Mood

Mood disturbances in epilepsy do not just happen in the background of a chronic condition. They are often tied directly to seizures themselves, in a pattern researchers call peri-ictal psychiatric symptoms. These fall into three phases: before, during, and after a seizure. In the hours or days leading up to a seizure, some people experience a prodromal mood shift, often irritability, anxiety, or a vague sense of dread. During the seizure itself, emotional symptoms can be part of the electrical event, particularly in temporal lobe epilepsy, where fear or panic may emerge as an actual seizure symptom rather than a reaction to what is happening. Systematic reviews of case reports have documented mood and anxiety disturbances, psychosis, and personality changes occurring during seizures themselves.

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The aftermath of a seizure, the postictal period, is where mood disruption hits many people hardest. Postictal psychiatric symptoms including anger, hostility, anxiety, depression, and paranoia may be more common than previously recognized. Irritability and anger in particular seem to be especially frequent after seizures, yet they are rarely asked about in routine clinical visits.² If you have ever felt emotionally raw, short-tempered, or deeply low in the day or two following a seizure, this is a recognized and physiological phenomenon, not a personal failing.

Mood Problems Between Seizures

Many people with epilepsy experience mood instability even when they are not having seizures, during what clinicians call the interictal period. A proposed condition called interictal dysphoric disorder captures a pattern that does not neatly fit the standard categories of depression or anxiety. It involves a cluster of symptoms: depressed mood, irritability, sudden bursts of euphoria, anxiety, and low energy, sometimes cycling unpredictably. In one study, nearly half of people with epilepsy met the criteria for this pattern, and the vast majority of them also qualified for a diagnosis of depression or anxiety on standard measures.³ Depressed mood, low energy, and irritability were the standout symptoms. What makes interictal dysphoric disorder tricky is that it can look like bipolar disorder from the outside, with its swings between low mood and occasional euphoria, but it does not follow the same extended-episode pattern that bipolar disorder does.

This matters because bipolar-like symptoms show up in epilepsy at rates well above what you would expect. One large study found bipolar symptoms in about 12% of people with epilepsy, roughly six and a half times more often than in healthy controls and about twice as often as in people with other chronic conditions like migraine, asthma, or diabetes.⁴ About half of those who screened positive had actually been diagnosed with bipolar disorder by a physician. But a quarter of them were carrying a diagnosis of plain depression, and another quarter had no mood diagnosis at all. This is a diagnostic gap with real consequences: treating bipolar-type mood swings as simple depression often means the wrong medication and worsening instability.

Shared Brain Chemistry Behind the Link

The overlap between epilepsy and mood disorders is not coincidental. Population studies have confirmed that people with epilepsy face higher rates of developing mood disorders, and people with mood disorders have a higher risk of developing epilepsy.⁵ This bidirectional relationship cannot be explained by one condition simply causing the other. Instead, common pathogenic mechanisms appear to be at work in both.

The neurotransmitter systems involved in seizure activity overlap heavily with those governing mood. Serotonin, norepinephrine, glutamate, and GABA all play dual roles in both conditions.⁶ Changes in these chemical systems create vulnerability to both seizures and emotional instability. This means that for many people, mood swings are not a side effect of epilepsy but rather a parallel expression of the same underlying brain changes. Temporal lobe epilepsy deserves special mention here, because seizure foci in the temporal lobe appear to carry a particularly high risk for depression, especially when seizures remain localized rather than spreading across the brain.⁷

When Your Anti-Seizure Medication Is Making Things Worse

This is one of the most practical questions for anyone with epilepsy and mood trouble: could the medication itself be the problem? The answer is yes, sometimes. Psychiatric and behavioral side effects occurred in about 17% of patients in a large review, and in roughly 14% the side effects were severe enough to require a medication change.⁸ People with a history of psychiatric conditions, those with hard-to-control seizures, and those with certain seizure types were at higher risk.

Levetiracetam stands out as the most frequent offender, with a psychiatric side effect rate of about 22%, significantly higher than other anti-seizure drugs as a group.⁸ While most mood-related side effects from levetiracetam are mild, including anxiety, agitation, and low mood appearing in the days after starting or adjusting the dose, a small number of patients develop more severe reactions.⁹ In a study of over 1,400 patients on levetiracetam, about 8% developed severe psychiatric symptoms including hallucinations, aggressive behavior, agitation, and in some cases suicidal or self-harm behaviors.¹⁰ If you started a new anti-seizure medication and your mood suddenly shifted, that timing is worth discussing with your neurologist.

On the other end of the spectrum, several anti-seizure drugs actually have mood-stabilizing properties. Carbamazepine, valproic acid, and lamotrigine are all used in psychiatry to treat mood disorders independent of epilepsy.¹¹ Lamotrigine in particular has been shown to improve mood states to a clinically meaningful degree in people with epilepsy, and that improvement persisted even after other anti-seizure drugs were withdrawn, suggesting the benefit came from lamotrigine itself rather than from any drug interaction.¹² Lamotrigine has also been approved in multiple countries for preventing depressive episodes in bipolar disorder, making it a natural choice when epilepsy and mood swings coexist.¹³

This is where the medication conversation gets genuinely useful. If you are on a drug that tends to destabilize mood, and a drug with mood-stabilizing properties would control your seizures equally well, the switch could address two problems at once. That trade-off is worth raising explicitly with your doctor, because neurologists may focus primarily on seizure control and not proactively ask about mood.

Treating Depression and Anxiety in Epilepsy

A persistent fear has discouraged treatment of mood disorders in people with epilepsy for decades: the worry that antidepressants will make seizures worse. Older tricyclic antidepressants did carry some risk of lowering the seizure threshold, but newer antidepressants tell a different story. SSRIs and SNRIs, the most commonly prescribed antidepressants today, are safe when used at therapeutic doses in people with epilepsy and may even have anti-seizure properties.¹⁴¹⁵ This is one of the most important misconceptions to correct: avoiding antidepressant treatment out of seizure fear leaves people suffering from treatable mood problems while the untreated depression itself may worsen seizure control.

Beyond medication, cognitive behavioral therapy has accumulated solid evidence specifically in epilepsy populations. A meta-analysis of randomized controlled trials found that CBT produced meaningful reductions in both depression and anxiety scores compared to control groups, and also improved quality of life.¹⁶ A separate trial found that women and people taking multiple anti-seizure medications benefited most from CBT interventions, with improvements in depression, seizure worry, and overall quality of life.¹⁷ Mindfulness-based approaches, yoga, and relaxation techniques have also shown encouraging results as add-ons to standard treatment, with responder rates in various studies ranging from 45% to 90%, though the evidence base for these approaches is smaller and less rigorous than for CBT.¹⁸

Hormonal Factors and Cyclical Mood Changes

For people who menstruate, an additional layer of mood complexity arises from hormonal fluctuations. Catamenial epilepsy, in which seizure frequency changes with the menstrual cycle, and premenstrual dysphoric disorder share a common biological thread: the influence of sex steroids, particularly progesterone and its derivative allopregnanolone, on GABA and glutamate systems in the brain.¹⁹ These are the same neurotransmitter systems already implicated in the epilepsy-mood link, which means hormonal shifts can simultaneously worsen seizure activity and destabilize mood. If your mood swings follow a monthly pattern and your seizures do too, that overlap is probably not coincidence. Tracking both symptoms against your cycle can give your treatment team useful information.

Mood Changes After Epilepsy Surgery

Epilepsy surgery, particularly temporal lobe resection, can be transformative for seizure control. Its effects on mood are more complicated. Most studies report that depression prevalence is reduced or similar after surgery compared to before, and severity of depression tends to stay the same or improve.²⁰ But a meaningful minority of patients experience new mood problems. Studies have found rates of new-onset depression after temporal lobe surgery ranging from essentially zero to 38%, depending on the study and follow-up period. In one cohort, about 14% of patients experienced clinically significant mood decline, and the rate was even higher in validation samples from other centers.²¹

Several risk factors predict post-surgical mood problems. Any prior psychiatric history roughly tripled the odds of mood decline. Surgery on the brain’s dominant hemisphere (the left side in most people) nearly doubled the risk compared to the non-dominant side. Younger age at surgery and being divorced were also associated with higher risk.²¹ Interestingly, patients who underwent frontal lobe surgery showed more extreme changes in mood in either direction than temporal lobe patients, meaning frontal surgery carried the risk of larger swings both toward improvement and toward worsening.²² If you are considering epilepsy surgery, a pre-surgical psychiatric evaluation is not just a formality. It helps identify who may need closer monitoring afterward.

Lifestyle Strategies That Can Help

Medication and therapy are the backbone of treatment, but complementary approaches have roles to play. A 2022 symposium reviewing the evidence base for lifestyle interventions in epilepsy found that yoga, mindfulness meditation, structured exercise, dietary modifications, and even music therapy may all serve as useful adjuncts to standard treatment.²³ None of these replaces anti-seizure medication, but regular physical activity and stress reduction practices have the advantage of addressing both seizure triggers and mood symptoms simultaneously. Sleep consistency deserves emphasis here too, since sleep deprivation is both a seizure trigger and a mood destabilizer, making it a single modifiable factor with outsized impact.

Keeping a mood diary alongside your seizure log can reveal patterns that are invisible in the moment. You may discover that your mood dips predictably a day after a seizure cluster, or that irritability spikes in the first week of a dose change, or that low mood tracks your menstrual cycle. These observations give your treatment team actionable data rather than a vague sense that something is off.

Suicide Risk and When to Get Immediate Help

This is uncomfortable but necessary to address directly. People with epilepsy face significantly elevated rates of suicidal thinking and behavior compared to the general population.²⁴ The drivers are multiple: the mood disorders discussed throughout this article, medication side effects, the social isolation that epilepsy can bring, and in some cases the neurobiological changes themselves. Some anti-seizure medications carry FDA boxed warnings about suicide risk, though disentangling the medication effect from the underlying disease risk remains genuinely difficult. If you or someone you know with epilepsy expresses suicidal thoughts, that warrants urgent contact with a healthcare provider or crisis service. Post-surgical suicide, while rare, has also been documented, with completed suicide occurring in up to 3% of patients over follow-up periods of one to four years in some series.²⁰

Mood Assessment in Children With Epilepsy

Children with epilepsy consistently show higher rates of behavioral and psychiatric problems compared to their peers. But there is a methodological wrinkle in this research worth knowing about. Most studies of psychiatric symptoms in pediatric epilepsy rely on parents filling out questionnaires about their child’s behavior. Parent reports are not fully objective; they reflect the parent’s own anxiety, expectations, and emotional state, and there is growing evidence of systematic biases in these proxy assessments.²⁵ This does not mean children with epilepsy are not experiencing real mood difficulties. They very likely are, given the shared neurobiology already described. But it does mean that direct assessment of the child, when age-appropriate, provides more reliable information than relying solely on what parents report. If your child with epilepsy seems to be struggling emotionally, a formal neuropsychological evaluation that includes direct interaction with the child is more informative than screening questionnaires alone.

The treatment landscape for children mirrors the adult picture in broad strokes: medication choice matters for mood, CBT adapted for younger ages has evidence behind it, and the epilepsy treatment team should include someone with psychiatric or psychological expertise. Children may have more difficulty articulating what they are feeling, which makes proactive screening even more important. Schools and caregivers often notice behavioral changes before anyone frames them as mood symptoms.

Why Mood Symptoms in Epilepsy Go Undiagnosed

Given how common mood problems are in epilepsy, you might expect them to be caught early and treated aggressively. In practice, the opposite often happens. Neurologists may focus clinic visits on seizure frequency and medication levels without asking about mood. Patients may not mention irritability or sadness because they assume it is just part of having epilepsy, or because they worry about being prescribed another medication. And the nature of epilepsy-related mood disturbance can make it hard to categorize: the interictal pattern of shifting irritability, brief euphoria, and intermittent low mood does not fit neatly into the depression or bipolar boxes that standard psychiatric screens are designed to catch. About a quarter of people with epilepsy who screen positive for bipolar symptoms have no mood diagnosis at all.⁴ That is a large pool of people who are symptomatic but invisible to the system. If you feel your mood is being overlooked at your epilepsy appointments, bringing it up explicitly, or requesting a referral to a neuropsychiatrist, is a reasonable and appropriate step.