Lamotrigine Accord-Uk (Lamotrigine)

Lamotrigine is an anticonvulsant that acts on seizure disorders and mood stabilization.

• Epilepsy (partial seizures): reduces frequency of focal onset seizures.
• Epilepsy (generalized seizures): helps control tonic‑clonic seizures.
• Bipolar disorder: maintains mood stability and prevents depressive episodes.

• Lamotrigine inhibits voltage‑gated sodium channels, which stabilizes neuronal membranes and diminishes the release of excitatory neurotransmitters such as glutamate, thereby reducing neuronal hyperexcitability associated with seizures and mood swings.

Lamotrigine may cause a range of adverse reactions.

Common Side Effects

• Dizziness: mild to moderate sensation of light‑headedness.
• Headache: occasional tension‑type headaches.
• Nausea: transient stomach upset.
• Rash: skin irritation that may appear as mild erythema.
• Blurred vision: temporary visual disturbances.
• Insomnia: difficulty falling or staying asleep.

Serious or Rare Side Effects

• Stevens‑Johnson syndrome: severe skin reaction requiring immediate medical attention.
• Toxic epidermal necrolysis: life‑threatening skin detachment.
• Blood dyscrasias: including agranulocytosis or aplastic anemia.
• Hepatic failure: signs of liver dysfunction.
• Suicidal thoughts: emergence of depressive or suicidal ideation.
• Severe skin reactions: including drug reaction with eosinophilia and systemic symptoms (DRESS).

Before initiating lamotrigine therapy, consider the following precautions.

• Dose titration: increase gradually to minimize rash risk.
• Skin reactions: monitor for any rash and discontinue if severe.
• Hepatic function: assess liver enzymes prior to treatment.
• Renal impairment: evaluate kidney function and adjust if necessary.
• Pregnancy: discuss potential risks with the prescriber.
• Store at ambient temperature: keep in the original pack, protect from moisture.

Lamotrigine can interact with several medicines, requiring careful management.

Major Interactions (Avoid)

• Valproic acid: markedly increases lamotrigine plasma concentrations.
• Carbamazepine: significantly reduces lamotrigine levels, risking loss of efficacy.
• Phenobarbital: lowers lamotrigine concentrations, potentially compromising seizure control.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: may decrease lamotrigine levels, requiring dose adjustment.
• Serotonergic agents: increased risk of serotonin syndrome when combined.
• Other antiepileptics: may necessitate monitoring and dose modifications.