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Lamotrigine is an antiepileptic drug that is also used for relapse prevention in bipolar disorder. What matters most is the slow dose titration over weeks and spotting skin rashes early – when it is taken correctly and reliably.
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Never stop taking lamotrigine on your own or pause it abruptly. Stopping suddenly can trigger seizures – always agree any changes with your practice. Lamotrigine (brand name Lamictal®) is an antiepileptic drug that works against epileptic seizures and is also used for maintenance treatment (relapse prevention) in bipolar disorder. A key feature is the slow dose titration over several weeks – this gradual "titrating up" lowers the risk of severe skin reactions.
| Property | Details |
|---|---|
| Active ingredient | Lamotrigine |
| Brand name | Lamictal® |
| ATC code | N03AX09 |
| Drug class | Antiepileptic / mood stabiliser |
| Form | Tablets 25, 50, 100, 200 mg |
| Intake | 1–2× daily, independent of meals |
| Standard dose | Maintenance usually 100–200 mg/day (titrate up slowly) |
| Monitoring | Above all, watch the skin during the first 8 weeks |
| Prescription required | Yes |
During an epileptic seizure, nerve cells in the brain fire excessively and uncontrollably. Lamotrigine blocks certain voltage-dependent sodium channels and thereby dampens the excessive release of excitatory messenger substances such as glutamate. This stabilises the nerve cells and makes seizures less frequent.
It is precisely this stabilising effect that is used in two areas: in epilepsy, lamotrigine helps prevent focal and generalised seizures. In bipolar disorder it is used for relapse prevention and above all protects against renewed depressive episodes. Unlike some other antiepileptic drugs, lamotrigine tends to be mood-stabilising rather than sedating.
The most important thing with lamotrigine is the slow dose titration: treatment starts with a very low dose that is increased step by step over several weeks. This gradual approach is not a formality – it specifically lowers the risk of severe skin reactions. Skipping steps is dangerous.
| Situation | Approach |
|---|---|
| Start (monotherapy) | 25 mg/day for 2 weeks, then increase slowly |
| Maintenance dose | usually 100–200 mg/day |
| Combination with valproate | lower starting dose, slower titration |
| Break in intake > a few days | restart the titration (after consultation) |
A missed dose is made up as soon as you notice – but never take a double amount at once. What generally applies to a missed dose is explained in the guide Forgotten your medication. Precisely because lamotrigine must not be paused abruptly, a reliable routine is especially important.
brite reliably reminds you to take your lamotrigine and documents it seamlessly.
The most relevant side effect of lamotrigine is a skin rash. It is usually harmless, but in rare cases it can be the start of a severe, life-threatening skin reaction – such as Stevens-Johnson syndrome. The risk is highest in the first 8 weeks of treatment and when the dose is increased too quickly. Particular attention is therefore needed here.
Besides the skin rash, other, mostly temporary side effects occur especially at the start and while titrating up. Many improve once the body has become used to the medication.
| Side effect | Frequency | What to do? |
|---|---|---|
| Headache, fatigue | Very common | Usually temporary; mention it if it is a burden |
| Dizziness, double vision | Common | Often dose-dependent; have it checked by a doctor |
| Nausea, sleep disturbances | Common | Usually harmless; get it checked if it persists |
| Skin rash with fever, blisters, mucous membranes | Rare | See a doctor immediately – an emergency if in doubt |
Compared with other antiepileptic drugs such as Levetiracetam or Pregabalin, lamotrigine usually causes little tiredness and is often well tolerated – the price for this is the necessary slow titration.
Lamotrigine is broken down in the liver, and this breakdown can be greatly accelerated or slowed by other medications. Check combinations in the interaction check.
| Substance / medication | Interaction | Recommendation |
|---|---|---|
| Valproate (valproic acid) | Lamotrigine level rises sharply | Halve the starting dose, titrate up very slowly |
| Contraceptive pill (oestrogen) | Lowers the lamotrigine level – its effect can decrease | Dose adjustment; watch when stopping the pill |
| Carbamazepine, phenytoin, phenobarbital | Accelerated breakdown, lower level | Higher lamotrigine dose needed |
| Rifampicin | Lowers the lamotrigine level | Adjust the dose with a doctor |
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