Lamotrigin Teva (Lamotrigine)

Lamotrigine is indicated for several seizure types and mood‑stabilisation conditions, acting on neuronal excitability pathways.

• Partial seizures: reduces seizure frequency in patients with focal onset seizures.
• Generalized tonic‑clonic seizures: helps prevent convulsive episodes in idiopathic generalized epilepsy.
• Lennox‑Gastaut syndrome: provides seizure prophylaxis for this severe childhood epilepsy.
• Bipolar disorder (maintenance therapy): stabilises mood and lowers the risk of manic or depressive episodes.

• Lamotrigine inhibits voltage‑gated sodium channels, which limits repetitive neuronal firing and stabilises neuronal membranes. By decreasing sodium influx, it reduces the release of excitatory neurotransmitters such as glutamate, thereby diminishing the propagation of seizure activity and contributing to mood stabilisation in bipolar disorder.

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

Common Side Effects

• Headache: mild to moderate intensity.
• Dizziness: transient episodes, especially at treatment initiation.
• Nausea: occasional gastrointestinal upset.
• Rash: mild skin irritation or erythema.
• Insomnia: difficulty falling or staying asleep.
• Fatigue: generalized tiredness.

Serious or Rare Side Effects

• Stevens‑Johnson syndrome: severe skin reaction requiring immediate medical attention.
• Aseptic meningitis: signs of meningitis without bacterial infection.
• Blood dyscrasias: abnormal blood counts such as leukopenia.
• Hepatic dysfunction: elevated liver enzymes.
• Severe hypersensitivity: systemic allergic response.
• Suicidal ideation: emergence or worsening of depressive thoughts.

Before initiating lamotrigine therapy, several safety considerations should be reviewed.

• Titration schedule: follow a gradual dose increase to minimise rash risk.
• Concomitant valproate: may require lower starting dose due to interaction.
• Renal or hepatic impairment: adjust dosing based on clinical judgment.
• Pregnancy: discuss potential risks and benefits with a healthcare provider.
• Monitoring: regular blood work for skin reactions and blood counts.
• Store at ambient temperature: keep below 25°C in the original container, protect from moisture and direct sunlight.

Lamotrigine interacts with several medicines that can alter its plasma concentration or increase adverse effects.

Major Interactions (Avoid)

• Valproic acid: can raise lamotrigine levels, increasing risk of severe rash.
• Carbamazepine: reduces lamotrigine concentrations, potentially decreasing efficacy.
• Phenobarbital: accelerates lamotrigine metabolism, lowering therapeutic levels.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: may decrease lamotrigine levels, requiring dose adjustment.
• Serotonergic agents: combined use may increase risk of serotonin syndrome.
• Antidepressants (e.g., SSRIs): monitor for additive CNS effects.
• Antiepileptic polytherapy: assess overall seizure control and side‑effect profile.