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FDA approved Lamotrigine Tablets (lamotrigine) for Epilepsy and Bipolar Disorder MaintenanceThe FDA has approved a drug called lamotrigine for epilepsy and bipolar disorder treatment

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Key Takeaway
Consider lamotrigine for epilepsy adjunctive therapy or bipolar maintenance with careful dose escalation to mitigate rash risk.

The FDA has approved lamotrigine tablets for multiple indications in epilepsy and bipolar disorder, offering clinicians a versatile treatment option. For epilepsy, it is indicated as adjunctive therapy in patients aged 2 years and older for partial-onset seizures, primary generalized tonic-clonic seizures, and generalized seizures of Lennox-Gastaut syndrome, and for conversion to monotherapy in adults aged 16 years and older with partial-onset seizures on specific single antiepileptic drugs. In bipolar disorder, it is approved for maintenance treatment of bipolar I disorder to delay the time to occurrence of mood episodes in patients treated for acute episodes with standard therapy, though it is not recommended for acute manic or mixed episodes. This approval provides a well-established medication with dosing considerations based on patient factors, but clinicians should note limitations such as the risk of rash and need for careful dose escalation.

Clinical Details (Mechanism · Dosing · Trial Data · Warnings)
Mechanism of Action

Not reported in label.

Indication & Patient Population

Lamotrigine tablets are indicated for: Epilepsy—adjunctive therapy in patients aged 2 years and older for partial-onset seizures, primary generalized tonic-clonic seizures, and generalized seizures of Lennox-Gastaut syndrome. Epilepsy—monotherapy in patients aged 16 years and older for conversion to monotherapy in patients with partial-onset seizures who are receiving treatment with carbamazepine, phenytoin, phenobarbital, primidone, or valproate as the single antiepileptic drug. Bipolar disorder: Maintenance treatment of bipolar I disorder to delay the time to occurrence of mood episodes in patients treated for acute mood episodes with standard therapy. Limitations of Use: Treatment of acute manic or mixed episodes is not recommended. Effectiveness in the acute treatment of mood episodes has not been established.

Dosing & Administration

Dosing is based on concomitant medications, indication, and patient age. To avoid an increased risk of rash, the recommended initial dose and subsequent dose escalations should not be exceeded. Do not restart lamotrigine tablets in patients who discontinued due to rash unless the potential benefits clearly outweigh the risks. Adjustments to maintenance doses will be necessary in most patients starting or stopping estrogen-containing products, including oral contraceptives. Discontinuation: Taper over a period of at least 2 weeks (approximately 50% dose reduction per week). For epilepsy, see tables for adjunctive therapy in patients older than 12 years and aged 2 to 12 years, and for conversion to monotherapy. For bipolar disorder, see tables. A therapeutic plasma concentration range has not been established; dosing should be based on therapeutic response.

Key Clinical Trial Data

trial data not available in label

Warnings & Contraindications

There are suggestions that the risk of severe, potentially life-threatening rash may be increased by coadministration with valproate, exceeding the recommended initial dose, or exceeding the recommended dose escalation, but cases have occurred in the absence of these factors. The risk of nonserious rash may be increased when the recommended initial dose and/or rate of dose escalation is exceeded and in patients with a history of allergy or rash to other AEDs. It is recommended that lamotrigine tablets not be restarted in patients who discontinued due to rash unless the potential benefits clearly outweigh the risks.

Place in Therapy

Lamotrigine tablets are used as adjunctive therapy for various seizure types in epilepsy and for maintenance in bipolar disorder, with specific dosing protocols to manage risks such as rash. They are not indicated for acute mood episodes or as initial monotherapy in epilepsy, and safety and effectiveness have not been established for certain conversion scenarios.

The U.S. Food and Drug Administration has approved a medication called lamotrigine for treating two conditions: epilepsy and bipolar disorder. Lamotrigine is not a new drug, but this approval confirms its use for specific situations in these conditions. For epilepsy, it can help control different types of seizures in people as young as 2 years old. For bipolar disorder, it can help maintain stability and delay future mood episodes in people with bipolar I disorder who have already been treated for an acute episode.

This approval means that doctors now have official confirmation about when and how to use lamotrigine for these conditions. It gives healthcare providers another option to consider when creating treatment plans for their patients. The drug has been used for many years, so doctors have experience with how it works and what side effects to watch for.

One important thing to know is that lamotrigine carries a risk of serious rash, especially when starting treatment. Because of this, doctors typically start with a low dose and increase it slowly over time. This careful approach helps reduce the risk of this side effect while allowing the medication to work properly.

If you or someone you know has epilepsy or bipolar disorder, this FDA approval means there's another treatment option that doctors can consider. The best way to understand what this means for individual situations is to have a conversation with a healthcare provider who knows your medical history and can explain how this medication might fit into your treatment plan.

What this means for you:
This FDA approval gives doctors another option for treating epilepsy and bipolar disorder.

Study Details

Study typeFda approval
PublishedOct 2011
View Original Abstract ↓
1 INDICATIONS AND USAGE Lamotrigine tablets are indicated for: Epilepsy—adjunctive therapy in patients aged 2 years and older: • partial-onset seizures. • primary generalized tonic-clonic (PGTC) seizures. • generalized seizures of Lennox-Gastaut syndrome. ( 1.1 ) Epilepsy—monotherapy in patients aged 16 years and older : Conversion to monotherapy in patients with partial-onset seizures who are receiving treatment with carbamazepine, phenytoin, phenobarbital, primidone, or valproate as the single antiepileptic drug. ( 1.1 ) Bipolar disorder : Maintenance treatment of bipolar I disorder to delay the time to occurrence of mood episodes in patients treated for acute mood episodes with standard therapy. ( 1.2 ) Limitations of Use: Treatment of acute manic or mixed episodes is not recommended. Effectiveness of lamotrigine tablets in the acute treatment of mood episodes has not been established. 1.1 Epilepsy Adjunctive Therapy Lamotrigine tablets are indicated as adjunctive therapy for the following seizure types in patients aged 2 years and older: • partial-onset seizures. • primary generalized tonic-clonic (PGTC) seizures. • generalized seizures of Lennox-Gastaut syndrome. Monotherapy Lamotrigine tablets are indicated for conversion to monotherapy in adults (aged 16 years and older) with partial-onset seizures who are receiving treatment with carbamazepine, phenytoin, phenobarbital, primidone, or valproate as the single antiepileptic drug (AED). Safety and effectiveness of lamotrigine tablets have not been established (1) as initial monotherapy; (2) for conversion to monotherapy from AEDs other than carbamazepine, phenytoin, phenobarbital, primidone, or valproate; or (3) for simultaneous conversion to monotherapy from 2 or more concomitant AEDs. 1.2 Bipolar Disorder Lamotrigine tablets are indicated for the maintenance treatment of bipolar I disorder to delay the time to occurrence of mood episodes (depression, mania, hypomania, mixed episodes) in patients treated for acute mood episodes with standard therapy [see Clinical Studies ( 14.2 )]. Limitations of Use Treatment of acute manic or mixed episodes is not recommended. Effectiveness of lamotrigine tablets in the acute treatment of mood episodes has not been established.
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