Lamotrigin Aurobindo (Lamotrigine)

Lamotrigine is an antiepileptic agent that modulates neuronal excitability.

• Epilepsy (generalized and focal seizures): reduces seizure frequency and severity.
• Bipolar disorder (maintenance therapy): stabilizes mood and helps prevent depressive episodes.
• Adjunctive therapy for refractory seizures: provides additional seizure control when other antiepileptics are insufficient.

• Lamotrigine inhibits voltage‑gated sodium channels on neuronal membranes, decreasing the influx of sodium ions during depolarization. This stabilizes neuronal membranes, reduces the release of excitatory neurotransmitters such as glutamate, and dampens abnormal neuronal firing that underlies seizures and mood instability.

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

Common Side Effects

• Dizziness: transient light‑headedness, especially after dose changes.
• Headache: mild to moderate intensity, often improves with continued therapy.
• Nausea: gastrointestinal upset that may lessen over time.
• Rash: skin irritation that should be monitored for progression.
• Blurred vision: temporary visual disturbances.
• Fatigue: feeling of tiredness or reduced energy.

Serious or Rare Side Effects

• Stevens‑Johnson syndrome: severe skin reaction requiring immediate medical attention.
• Toxic epidermal necrolysis: life‑threatening skin detachment.
• Blood dyscrasias: rare cases of aplastic anemia or agranulocytosis.
• Hepatic failure: severe liver injury, though uncommon.
• Suicidal ideation: emergence or worsening of depressive thoughts.

Lamotrigine requires careful monitoring and patient education.

• Dose titration: increase gradually to minimise risk of rash.
• Monitor skin: discontinue at first sign of widespread rash or hypersensitivity.
• Assess hepatic function: adjust dose in patients with liver impairment.
• Pregnancy: avoid unless benefits outweigh potential risks; discuss with a healthcare professional.
• Store at room temperature: keep in the original pack, protect from moisture and light.

Lamotrigine interacts with several medicines that can alter its plasma levels.

Major Interactions (Avoid)

• Valproic acid: markedly increases lamotrigine concentrations, raising toxicity risk.
• Carbamazepine: significantly reduces lamotrigine levels, potentially decreasing efficacy.
• Phenytoin: lowers lamotrigine concentrations, requiring dose adjustment.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: may reduce lamotrigine levels, necessitating monitoring.
• Serotonergic agents: combined use may increase risk of serotonin syndrome.
• Phenobarbital: decreases lamotrigine exposure, possibly requiring dose increase.