Lamotrigine

Lamotrigine, the active ingredient in Lamotrigine, is an Anticonvulsant presented as a tablet for oral use. It treats partial seizures, generalized tonic‑clonic seizures and is used as maintenance therapy in bipolar disorder.

GNH USA supplies Lamotrigine as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Lamotrigine is employed in the management of seizure disorders and mood stabilization, acting on neuronal excitability. - Partial seizures: reduces frequency and severity of focal onset seizures. - Generalized tonic‑clonic seizures: helps control convulsive episodes in generalized epilepsy. - Bipolar disorder (maintenance therapy): stabilizes mood and decreases recurrence of depressive and manic episodes.

Lamotrigine may cause a range of adverse reactions, which are categorized by frequency and severity.

Common Side Effects: - Dizziness - Headache - Nausea - Rash - Blurred vision - Fatigue

Serious or Rare Side Effects: - Stevens‑Johnson syndrome or toxic epidermal necrolysis - Severe skin reactions such as exfoliative dermatitis - Blood dyscrasias including agranulocytosis - Hepatic failure - Aseptic meningitis - Multiorgan hypersensitivity reactions

When prescribing lamotrigine, clinicians should consider several safety measures to minimize risks. - Monitor blood counts: perform baseline and periodic hematologic testing. - Adjust dose in hepatic impairment: start low and titrate slowly. - Avoid abrupt discontinuation: taper gradually to prevent seizure worsening. - Use caution in patients with a history of rash: assess risk of severe skin reactions. - Review concomitant valproate therapy: it can increase lamotrigine plasma levels. - Store at room temperature: keep in the original packaging, protect from moisture and light.

Lamotrigine interacts with several medications that can alter its plasma concentration or increase adverse effect risk.

Major Interactions (Avoid): - Valproic acid: markedly increases lamotrigine levels, requiring dose reduction. - Carbamazepine: significantly reduces lamotrigine concentrations, potentially decreasing efficacy. - Phenytoin: lowers lamotrigine levels, may necessitate dose adjustment.

Moderate Interactions (Monitor Closely): - Oral contraceptives: estrogen‑containing pills can reduce lamotrigine levels, possibly requiring dose increase. - Serotonergic agents: combined use may raise the risk of serotonin syndrome. - Phenobarbital: induces metabolism leading to lower lamotrigine exposure.