Antiepileptic Drug Effects on Neurological Health

Antiepileptic drugs (AEDs) constitute a diverse pharmacopeia targeting neuronal excitability through mechanisms such as modulation of voltage-gated ion channels, enhancement of inhibitory neurotransmission and attenuation of excitatory pathways. Initially developed to prevent recurrent seizures, these agents exert profound effects on brain physiology that extend beyond seizure control, influencing neurodevelopment, cognition, mood and neuroinflammation. Emerging evidence indicates that long-term AED use may reshape synaptic connectivity, alter glial function and modulate neurotrophic factor expression, with implications for plasticity, recovery after brain injury and comorbid psychiatric disorders. While some AEDs demonstrate neuroprotective properties, others carry risks including cognitive slowing, motor disturbances and teratogenicity. Therapeutic decision-making therefore requires a balance between efficacious seizure suppression and preservation of broad neurological health, taking into account individual factors such as age, comorbidity, genetic profile and reproductive plans. Ongoing research seeks to refine personalised treatment regimens, identify biomarkers for adverse effects and develop novel compounds that preserve network stability while minimising off-target actions. In this context, an integrated understanding of AED interactions with immune signalling, synaptic architecture and metabolic pathways is essential to optimise long-term outcomes for people with epilepsy and related neurological conditions.

Research from Nature Portfolio

Recent studies have revealed a critical immunomodulatory role for the anticonvulsant pregabalin. In murine models of inflammation, pregabalin attenuates pro-inflammatory cytokine secretion (IL-1β, IL-6, TNF-α) both in vivo and in vitro and mitigates mitogen-induced splenic histological alterations. These findings suggest that the therapeutic efficacy of pregabalin in epilepsy and chronic pain syndromes may derive not only from synaptic calcium channel modulation but also from suppression of inflammatory pathways, offering a new perspective on long-term neurological health and comorbidity management.

Antiepileptic Drug Effects on Neurological Health publication trend

The graph below shows the total number of articles in antiepileptic drug effects on neurological health across all publications each year (not limited to Nature Index journals).

Technical terms

Cytokine: A signalling protein secreted by immune cells that mediates inflammation and influences neuronal viability.

Mitogen: A substance that induces cellular division and activation, often used to stimulate immune responses in vitro.

Myoclonus: A rapid, involuntary muscle jerk that can arise as a side-effect of medication or neurological disorder.

Dyskinesia: An abnormal, involuntary movement, such as chorea or athetosis, often linked to neurotransmitter imbalance.

Neuroplasticity: The capacity of neural circuits to reorganise in response to experience, injury or pharmacological agents.

References

1. Modulation of Cytokine Production by Drugs with Antiepileptic or Mood Stabilizer Properties in Anti‐CD3‐ and Anti‐CD40‐Stimulated Blood In Vitro. Oxidative Medicine and Cellular Longevity (2014).
2. Pregabalin inhibits in vivo and in vitro cytokine secretion and attenuates spleen inflammation in Lipopolysaccharide/Concanavalin A -induced murine models of inflammation. Scientific Reports (2020).
3. Drug-Induced Myoclonus: A Systematic Review. Medicina (2025).
4. A case of dyskinesia after levetiracetam administration. BMC Neurology (2019).