Lamotrigin Teva (Lamotrigine)

Lamotrigine is an anticonvulsant used in the management of seizure disorders and mood stabilization.

• Epilepsy: reduces the frequency and severity of partial and generalized tonic‑clonic seizures.
• Bipolar disorder: helps maintain mood stability and prevents depressive or manic relapse.
• Seizure prophylaxis in patients with Lennox‑Gastaut syndrome: contributes to overall seizure control when used as part of combination therapy.

• Lamotrigine inhibits voltage‑gated sodium channels, which stabilizes neuronal membranes and reduces excessive neuronal firing. By limiting the release of excitatory neurotransmitters such as glutamate, it diminishes the propagation of epileptic activity and modulates mood‑related pathways, contributing to its antiepileptic and mood‑stabilizing effects.

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

Common Side Effects

• Dizziness: transient sensation of light‑headedness.
• Headache: mild to moderate intensity.
• Nausea: occasional gastrointestinal upset.
• Blurred vision: temporary visual disturbances.
• Rash: mild skin irritation or erythema.
• 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 aplastic anemia or agranulocytosis.
• Hepatic failure: signs of liver dysfunction.
• Suicidal thoughts: emergence of depressive or suicidal ideation.
• Severe hypersensitivity: anaphylaxis or angioedema.

When prescribing or dispensing Lamotrigine, several safety considerations are essential.

• Monitor blood counts: perform periodic complete blood count assessments.
• Avoid abrupt discontinuation: taper the dose under medical supervision to prevent seizure recurrence.
• Use caution in hepatic impairment: adjust dosing based on liver function.
• Pregnancy: discuss potential risks and benefits with the patient.
• Review concomitant medications: assess for possible drug interactions.
• Store at ambient temperature: keep in the original container, protect from moisture and direct sunlight.

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

Major Interactions (Avoid)

• Valproic acid: markedly raises lamotrigine concentrations, increasing risk of severe skin reactions.
• Carbamazepine: significantly lowers lamotrigine levels, reducing therapeutic effect.
• Phenobarbital: decreases lamotrigine exposure, potentially compromising seizure control.

Moderate Interactions (Monitor Closely)

• Oral contraceptives: may increase lamotrigine clearance, requiring dose adjustment.
• Serotonergic antidepressants: monitor for signs of serotonin syndrome.
• Other antiepileptics (e.g., phenytoin): may modestly reduce lamotrigine concentrations.