Lacosamide Accord (Lacosamide)

Lacosamide is an antiepileptic medication that modulates neuronal sodium channels.

• Partial‑onset seizures: reduces seizure frequency in patients with focal epilepsy.
• Epilepsy: provides adjunctive therapy to improve overall seizure control.
• Refractory focal epilepsy: helps achieve better seizure management when other treatments are insufficient.

• Lacosamide enhances the slow inactivation of voltage‑gated sodium channels in neuronal membranes, stabilizing hyperexcitable neuronal membranes and decreasing repetitive firing. This modulation reduces neuronal hyperexcitability that underlies seizure generation, contributing to its antiepileptic effect.

Lacosamide may cause a range of adverse reactions, varying from mild to severe.

Common Side Effects

• Dizziness: sensation of light‑headedness or imbalance.
• Nausea: upset stomach often accompanied by an urge to vomit.
• Headache: mild to moderate pain in the head region.
• Fatigue: feeling unusually tired or lacking energy.
• Blurred vision: temporary loss of visual clarity.
• Diplopia: double vision, especially at higher doses.

Serious or Rare Side Effects

• Stevens‑Johnson syndrome: severe skin reaction requiring immediate medical attention.
• Cardiac arrhythmias: irregular heart rhythms, particularly in patients with pre‑existing conduction disorders.
• Suicidal thoughts: emergence of depressive symptoms or suicidal ideation.
• Severe hepatic injury: marked elevation of liver enzymes or liver failure.
• Life‑threatening skin reactions: toxic epidermal necrolysis or drug reaction with eosinophilia and systemic symptoms (DRESS).

When prescribing Lacosamide, clinicians should consider several safety aspects.

• Renal impairment: assess kidney function and adjust dose if necessary.
• Hepatic impairment: monitor liver enzymes and consider dose modification.
• Cardiac conduction disorders: use caution in patients with known arrhythmias or AV‑node disease.
• Pregnancy: risk category is unknown; discuss potential benefits and risks with the patient.
• Concomitant antiepileptics: monitor for additive CNS effects and possible pharmacokinetic interactions.
• Store at ambient temperature: keep below 25 °C, retain in original packaging, and protect from moisture.

Lacosamide can interact with other medicines, affecting its efficacy or safety.

Major Interactions (Avoid)

• Carbamazepine: may lower lacosamide plasma concentrations, reducing effectiveness.
• Strong CYP2C19 inhibitors (e.g., fluconazole): can increase lacosamide exposure, raising toxicity risk.
• Other sodium‑channel blockers (e.g., phenytoin): may enhance cardiac conduction effects.

Moderate Interactions (Monitor Closely)

• Valproate: combined use may increase CNS side‑effects; monitor patient tolerance.
• Alcohol: concurrent consumption can intensify dizziness and sedation.
• Other antiepileptics: additive side‑effects may require dose adjustments.