Lamotrigine: Brands, Price & Uses in Bangladesh

Lamotrigine is an anticonvulsant (antiepileptic) and mood-stabilizing medicine. Its established, guideline-supported uses are:

Epilepsy (FDA-approved / guideline-supported)

• Adjunctive therapy (add-on to other antiepileptic drugs) in patients aged 2 years and older for: partial-onset seizures, primary generalized tonic-clonic seizures, and generalized seizures of Lennox-Gastaut syndrome.
• Monotherapy conversion in adults and adolescents (16 years and older) with partial-onset seizures who are being converted from a single enzyme-inducing antiepileptic drug (carbamazepine, phenytoin, phenobarbital, or primidone) or from valproate to Lamotrigine monotherapy.

Bipolar I Disorder (FDA-approved)

• Maintenance treatment of bipolar I disorder in adults, to delay the time to occurrence of mood episodes (depression, mania, hypomania, mixed episodes) after the acute episode has been managed with standard therapy. Lamotrigine is not indicated for acute treatment of manic or mixed episodes.

Off-label / adjunct uses (not FDA-approved, used based on clinical experience)

• Bipolar depression (acute), as an adjunct in treatment-resistant depression, and neuropathic pain in some patients — these uses are not FDA-approved and should only be undertaken under specialist supervision.

Dosing of Lamotrigine is highly individualized and depends on the indication, patient age, and — critically — on concomitant medications, because the risk of serious rash rises sharply with faster-than-recommended titration. Always follow the exact titration schedule prescribed by the physician; do not increase the dose faster than instructed.

Epilepsy — Adjunctive Therapy (Adults and children ≥2 years)

Epilepsy — Monotherapy Conversion (Adults/adolescents ≥16 years)

A specific, gradual switch-over schedule is used to transition from the prior antiepileptic drug to Lamotrigine monotherapy over several weeks, per the prescribing physician's instructions; typical target maintenance dose is around 300–500 mg/day.

Bipolar I Disorder Maintenance (Adults)

Started with a slow titration over about 6 weeks, similar in principle to the epilepsy titration (adjusted for concomitant valproate or enzyme inducers), reaching a usual target maintenance dose of approximately 200 mg/day (100 mg/day with valproate; up to 400 mg/day with enzyme inducers, without valproate), as directed by the physician.

Important dosing safeguards

• Do not restart Lamotrigine at the previous maintenance dose if doses have been missed for more than a few days (e.g. 5 or more consecutive days) — restarting at the full prior dose sharply increases rash risk. The original titration schedule must be followed again; consult the physician.
• Do not stop Lamotrigine abruptly unless directed for a rash-related emergency — abrupt discontinuation can increase the risk of seizure recurrence; when stopping electively, the dose is tapered over at least 2 weeks under medical supervision.

Serious side effect — seek immediate medical attention:

• Serious skin rash, including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN), which can be life-threatening. Any rash occurring during Lamotrigine treatment — especially one that is widespread, blistering, involves the mouth/eyes/genitals, or is accompanied by fever, swollen glands, or facial swelling — requires immediate medical evaluation and, in most cases, stopping Lamotrigine unless the rash is clearly unrelated. See Precautions and Warnings for details on minimizing this risk.
• Signs of aseptic meningitis (headache, fever, stiff neck, nausea, vomiting, rash, sensitivity to light) — rare but requires prompt evaluation.
• Multiorgan hypersensitivity reaction (fever, rash, and involvement of other organs such as liver or kidneys) — rare but serious.

Common side effects

• Dizziness
• Headache
• Double vision (diplopia) or blurred vision
• Loss of coordination (ataxia)
• Nausea and vomiting
• Insomnia or somnolence (drowsiness)
• Mild, non-serious rash
• Tremor, fatigue, back pain