Lamictal
In brief
- Lamictal (lamotrigine) is a prescription-only medicine (POM) in the UK.
- Lamotrigine is used to treat epilepsy (adjunctive or monotherapy for partial and generalised seizures) and as a mood stabiliser to help prevent depressive episodes in bipolar disorder. It works by stabilising neuronal membranes, principally through inhibition of voltage‑gated sodium channels and reduction of glutamate release.
- Usual dosage: start low and titrate (commonly 25 mg once daily for 1–2 weeks then increased gradually). Typical maintenance doses are around 100–200 mg/day (divided doses); doses may be increased up to 200–400 mg/day with enzyme inducers, and reduced when given with valproate or in hepatic impairment; paediatric and elderly dosing is weight- or function‑based.
- Form of administration: oral tablets (standard 25, 50, 100, 200 mg), dispersible/chewable tablets and starter/titration blister packs.
- Onset time: symptomatic effects may begin as the drug reaches therapeutic levels over 1–2 weeks; mood‑stabilising benefits and full antiepileptic effect often take several weeks and require proper titration.
- Duration of action: provides about 24 hours of coverage with standard dosing; the elimination half‑life is typically around 25–33 hours but is shortened by enzyme inducers and prolonged by valproate or hepatic impairment.
- Alcohol warning: avoid excessive alcohol while taking lamotrigine — alcohol can increase dizziness, drowsiness and may raise seizure risk; combine with caution and seek medical advice.
- The most common side effect is headache; other frequent effects include dizziness, nausea, sleep disturbance and skin rash. Serious skin reactions (e.g. Stevens–Johnson syndrome) are uncommon but require immediate medical attention and are more likely with rapid titration or with valproate co‑therapy.
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Basic Lamictal information
- INN (international nonproprietary name): Lamotrigine
- Brand names available in the United Kingdom: Lamictal (GSK) and generic lamotrigine
- ATC code: N03AX09
- Forms and dosages: tablets 25 mg, 50 mg, 100 mg, 200 mg; dispersible/chewable tablets 2 mg, 5 mg, 25 mg, 100 mg; starter/titration packs
- Manufacturers in the United Kingdom: GSK (originator); generics from other manufacturers
- Registration status in the United Kingdom: MHRA-licensed prescription-only medicine (POM)
- OTC / Rx classification: Prescription-only medicine (POM)
Legal status and availability in the UK
Lamictal is a prescription-only medicine (POM) in the UK.
In our online pharmacy, Lamictal is available without a prescription, with discreet delivery to the United Kingdom in 5‑14 days.
Indications and how lamotrigine is used
Typical clinical uses
Lamotrigine is used for epilepsy or as a mood stabiliser in bipolar disorder to prevent depressive episodes.
Titration is essential to reduce the risk of skin rash and starter packs commonly cover a 5‑week gradual dosing schedule.
An adult switching from valproate co‑therapy may need a lower lamotrigine dose and a slower titration schedule.
A woman of childbearing potential commonly asks about contraception and pregnancy planning while taking lamotrigine.
Frequently asked questions
Q: How long until it works?
A: Effect on mood or seizure threshold is reached after titration and maintenance dosing; timelines vary by indication and individual response.
Q: Do I need a starter pack?
A: Starter packs are used to follow the recommended 5‑week titration to limit rash risk; follow prescriber instructions.
Packaging, storage and available formats
Presentations
Lamictal is available as dispersible/chewable tablets and standard tablets.
Starter or titration packs are common and are supplied as five‑week sets with combination blister doses.
Storage advice is store below 25°C and protect from moisture and light, with dispersible tablets kept in original packaging.
- Dispersible/chewable tablets
- Strengths 2, 5, 25, 100 mg; sensitive to moisture; keep in original pack.
- Standard tablets
- Strengths 25, 50, 100, 200 mg; usually blister‑packed.
Dosage protocols and practical titration guidance
Dosing summary
Initial dosing depends on co‑medications with enzyme inducers or inhibitors, so the full medication list must be checked.
Typical monotherapy initiation often starts at 25 mg once daily for 2 weeks then increases slowly to a maintenance dose.
Maintenance ranges for adults commonly sit between 100–200 mg/day, with up to 400 mg/day possible when enzyme inducers are present.
When valproate is co‑prescribed, lower lamotrigine doses and slower titration are required due to increased lamotrigine levels.
Children use weight‑based dosing and slower titration; elderly patients should start at the lower end and titrate cautiously.
| Scenario | Starting dose | Typical maintenance |
|---|---|---|
| Monotherapy, adult | 25 mg once daily for 2 weeks then increase | 100–200 mg/day |
| Adjunct with enzyme inducer | 25 mg once daily (adjust per prescriber) | Up to 200–400 mg/day |
| Adjunct with valproate | Lower starting dose; extended titration | Lower maintenance dose than monotherapy |
Safety profile and key adverse effects
What patients need to know
Common mild side effects include headache, dizziness, nausea and sleep disturbance.
The most critical safety concern is skin rash that can rarely progress to Stevens–Johnson syndrome or toxic epidermal necrolysis.
Risk of severe rash increases with rapid titration, co‑administration with valproate and in children.
Other notable effects include blurred vision, ataxia and gastrointestinal upset which may require monitoring.
Patients should stop treatment and seek urgent medical attention if a widespread rash, mucosal lesions or systemic symptoms occur.
Drug interactions and co‑prescribing practicalities
Common interactions
Valproate markedly increases lamotrigine plasma levels and necessitates lower lamotrigine doses and slower titration.
Enzyme inducers such as carbamazepine and phenytoin reduce lamotrigine concentrations and may require higher maintenance doses.
Combined hormonal contraceptives containing ethinylestradiol can alter lamotrigine clearance; levels may fall on combined pills and rise during pill‑free weeks.
Other CNS depressants and many psychiatric medications should be reviewed for additive effects and interaction potential.
| Drug | Effect on lamotrigine | Practical action |
|---|---|---|
| Valproate | Increases lamotrigine levels | Use lower doses; slow titration; liaise with prescriber |
| Carbamazepine / Phenytoin | Reduce lamotrigine levels | May need higher maintenance dose; monitor clinical response |
| Combined hormonal contraceptives | Can alter lamotrigine clearance | Advise monitoring; coordinate with prescriber for serum checks |
Pregnancy, contraception and breastfeeding considerations
Counselling points
Lamotrigine is used in pregnancy for epilepsy and is often preferred over valproate because of lower teratogenic risk.
Plasma clearance of lamotrigine commonly increases in pregnancy and dose adjustments with therapeutic monitoring may be required.
Pregnant women should be managed in liaison with obstetric neurologists or specialist midwives for dose and monitoring plans.
Lamotrigine is excreted into breast milk and breastfeeding is often considered compatible after individual risk/benefit assessment.
- Practical guidance
- Check serum levels in pregnancy, consult specialist, and avoid unplanned changes without prescriber input.
- Contraception
- Discuss effective contraception and preconception planning with women of childbearing potential before changing therapy.
Missed doses, overdose guidance and emergency response
Patient instructions
If a dose is missed, take it as soon as remembered unless it is close to the next dose, and do not double up.
Signs of overdose include ataxia, nystagmus, seizures and altered consciousness and require immediate medical assessment.
Emergency management is supportive and may require hospitalisation with monitoring of vital signs and neurologic status.
- Emergency actions: advise A&E for severe symptoms, call NHS 111 for urgent but non‑life‑threatening concerns, contact prescriber for dosing queries.
Regulatory status
Lamotrigine is a prescription-only medicine (POM) licensed by the MHRA for epilepsy and for the prevention of depressive episodes in bipolar disorder.
ATC classification N03AX09 lists lamotrigine as an “other antiepileptic”.
Alternatives and switching notes
How lamotrigine compares
Levetiracetam (Keppra) is valued for rapid titration and minimal monitoring compared with lamotrigine.
Valproate (Depakote) is effective for many seizure types but carries higher pregnancy risk than lamotrigine.
Carbamazepine and oxcarbazepine have predictable interactions and are alternatives depending on seizure type and comorbidities.
Lamotrigine’s advantages include a favourable cognitive profile and mood‑stabilising effects, while disadvantages are the need for slow titration and rash risk.
| Drug | Efficacy | Tolerability | Pregnancy risk | Titration speed |
|---|---|---|---|---|
| Lamotrigine | Good for partial/generalised seizures | Generally well tolerated; rash risk | Lower risk than valproate | Slow |
| Levetiracetam | Effective, broad spectrum | Good tolerability | Moderate | Fast |
| Valproate | Highly effective | Weight gain, tremor | High teratogenic risk | Moderate |
Patient questions and answers
What is lamotrigine?
Lamotrigine (INN) is an antiepileptic medicine prescribed for certain types of seizures and for preventing depressive episodes in bipolar disorder.
How should I take it?
Follow the prescriber’s titration schedule exactly; do not change dose without medical advice.
Why is titration important?
Gradual dose increases reduce the risk of serious skin reactions.
What should I watch for?
Common side effects include headache and dizziness, but stop treatment and seek urgent care for widespread rash or mucosal lesions.
Can I drink alcohol?
Alcohol may worsen dizziness and drowsiness; advise moderation and discuss with the prescriber.
What if I am pregnant or breastfeeding?
Discuss pregnancy planning with the prescriber as lamotrigine levels can change in pregnancy and dosing may require monitoring.
How long until it works?
Clinical benefit is usually assessed after titration and during maintenance; timelines vary by condition and individual response.
Can I switch brands?
Brand switches are possible but advise monitoring for changes in seizure control or side effects and check tablet appearance to avoid confusion.
Delivery across the United Kingdom
| City | Region | Delivery Time |
|---|---|---|
| London | Greater London | 9–21 days |
| Birmingham | West Midlands | 9–21 days |
| Manchester | Greater Manchester | 9–21 days |
| Glasgow | Scotland | 9–21 days |
| Leeds | West Yorkshire | 9–21 days |
| Liverpool | Merseyside | 9–21 days |
| Bristol | South West England | 9–21 days |
| Edinburgh | Scotland | 9–21 days |
| Cardiff | Wales | 9–21 days |
| Belfast | Northern Ireland | 9–21 days |
| Sheffield | South Yorkshire | 9–21 days |
| Newcastle Upon Tyne | North East England | 9–21 days |
| Nottingham | Nottinghamshire | 9–21 days |
