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Sedatives and hypnotics encompass a wide range of substances, each with its unique mechanism of action, uses, and potential adverse effects.
Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
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Antiepileptic drugs are specialized medications that prevent seizures in individuals diagnosed with epilepsy. These drugs primarily function by blocking the movement of sodium ions through channels in the neuronal membrane, inhibiting the repetitive firing of action potentials often associated with seizures.
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Antiepileptic Drugs: GABAergic Pathway Potentiators01:18

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Antiepileptic Drugs: Calcium Channel Blockers01:17

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Calcium channel blockers, a class of antiepileptic drugs, regulate the flow of calcium ions within neurons.
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Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
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Related Experiment Video

Updated: May 3, 2026

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Cenobamate's effect on mood and seizure frequency.

Mert Karatas1, Alperan Yavuz2, Blake Newman2

  • 1Department of Neurology, University of Utah, Salt Lake City, UT 84132, USA; Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA.

Epilepsy & Behavior : E&B
|January 30, 2026
PubMed
Summary

Cenobamate (CNB) effectively reduced seizure frequency in patients with epilepsy without worsening depressive symptoms. This real-world study indicates CNB is a safe and effective adjunctive treatment for seizure control.

Keywords:
CenobamateMoodPsychiatric comorbidities of epilepsyTreatment-resistant epilepsy

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Area of Science:

  • Epilepsy and Neurological Disorders
  • Pharmacology and Therapeutics
  • Psychiatry and Mental Health

Background:

  • Newly approved antiseizure medications (ASMs) require real-world efficacy and tolerability assessments, as these may differ from clinical trial findings.
  • Approximately 40% of people with epilepsy (PWE) experience comorbid depression, necessitating evaluation of mood-related effects of new ASMs.
  • Cenobamate (CNB) demonstrated significant efficacy in controlled trials, but its impact on mood in a real-world epilepsy population needs further investigation.

Purpose of the Study:

  • To evaluate the real-world impact of adjunctive cenobamate (CNB) on mood, tolerability, and seizure control in adult patients with refractory focal epilepsy.
  • To assess changes in depressive symptoms using Patient Health Questionnaire-9 (PHQ-9) scores.
  • To analyze seizure frequency reduction and seizure freedom rates.

Main Methods:

  • A single-center retrospective chart review of adult patients with refractory focal epilepsy initiating CNB as add-on therapy (May 2020-July 2023).
  • Inclusion criteria: ≥3 months on CNB, available seizure frequency at baseline and follow-up, and paired PHQ-9 scores.
  • Seizure outcomes analyzed by paired change, log2 fold-change, and percent change; response defined by seizure freedom, ≥50%, or ≥75% seizure reduction.

Main Results:

  • 73 adult PWE met study criteria; median seizure frequency decreased from 5 to 1.5 per 30 days (p < 0.001), a 50% median reduction.
  • 29% of patients achieved seizure freedom at the last follow-up (median 488 days).
  • Patient Health Questionnaire-9 (PHQ-9) scores did not significantly worsen (median ΔPHQ-9 = 0), with no association between covariates and mood outcomes.

Conclusions:

  • Cenobamate (CNB) is a safe and effective adjunctive ASM for improving seizure control in PWE.
  • CNB did not significantly alter PHQ-9 scores, suggesting a neutral effect on depressive symptoms in this cohort.
  • While improved seizure control may influence mood, the variable individual mood impact highlights the need for further research.