Sibelium
Sibelium is flunarizine 5 mg / 10 mg oral tablets from Janssen — selective calcium-channel blocker with antihistaminic and anti-dopaminergic action. First-line migraine preventive in European, Asian, and Latin American guidelines (not FDA-approved in US). Standard dose 10 mg at bedtime for adults under 65; 5 mg for elderly or paediatric. Particularly effective for paediatric migraine, vestibular migraine, and hemiplegic migraine. Maximum continuous course 6 months.
✓ Verificat medical de Morgan Ellis — Cercetător farmaceutic · 8 ani de experiență · Ultima recenzie: mai 2026
⚡ Quick Answer — What is Sibelium?
Sibelium conține flunarizine 5 mg / 10 mg tablets from Janssen Pharmaceuticals — a selective calcium-channel blocker with antihistaminic and anti-dopaminergic activity, used as a first-line preventive for episodic and chronic migraine in Europe, Asia, and South America (not FDA-approved in the US). Standard dose: 10 mg nightly for adults, 5 mg nightly for patients <40 kg or >65 years. Full effect at 6-8 weeks. Reduces migraine frequency by 50-70% in responders — one of the most effective oral migraine preventives in head-to-head trials, matched only by topiramate. Particularly useful for: childhood and adolescent migraine (≥5 years), vertiginous / vestibular migraine, hemiplegic migraine, and cyclic vomiting syndrome. Main side effects: weight gain (in ~15%), sedation, and — with long-term use — drug-induced parkinsonism and depression (dopaminergic blockade). Maximum recommended continuous duration 6 luni, with a planned washout.
What Is Sibelium?
Sibelium is an oral tablet of flunarizine 5 mg / 10 mg from Janssen Pharmaceuticals, supplied in 30-180 tablet packs. Flunarizine is a piperazine-derivative selective calcium-channel blocker with additional antihistaminic (H1) and weak anti-dopaminergic (D2) activity. It has been widely used in Europe since the 1980s as Sibelium (original Janssen brand) for migraine prophylaxis and vestibular disorders. Not FDA-approved in the US — hence unfamiliar to many US-trained physicians despite being first-line in European, Asian, and Latin American headache guidelines.
How Flunarizine Prevents Migraine
Flunarizine’s migraine efficacy is thought to involve four mechanisms:
- Selective calcium-channel blockade — reduces intracellular calcium overload in vulnerable neurons; inhibits cortical spreading depression (the pathophysiological substrate of migraine aura)
- Vasomotor stabilisation — reduces both vasodilation and vasospasm of cranial arteries
- Antihistaminic effect (H1) — explains the sedation and antivertigo action
- Weak D2 dopamine-receptor antagonism — explains both the efficacy in migraine (where dopamine dysregulation is implicated) and the long-term parkinsonism / depression side effects
Approved and Evidence-Based Uses
- Migraine prophylaxis in adults — reduces monthly migraine days by 50-70% (several randomised trials; meta-analysis NNT ~3)
- Paediatric migraine prophylaxis (children 5+, adolescents) — particularly effective; often the first-line preventive in European paediatric neurology
- Hemiplegic migraine prophylaxis (familial and sporadic)
- Vestibular migraine — useful for both migraine and vertigo components
- Ménière’s disease — vertigo reduction
- Cyclic vomiting syndrome in children
- Peripheral vestibular vertigo (non-migraine)
Sibelium Dosage
- Adults (<65 years, >40 kg): 10 mg orally at bedtime
- Adults >65 years or <40 kg body weight: 5 mg at bedtime
- Children 5+ (off-label in some countries): 5 mg at bedtime
- Take at night — flunarizine is sedating, which helps sleep onset and reduces daytime drowsiness
- Take with or without food
- Assess benefit at 6-8 weeks
- Maximum continuous course: 6 months, then a planned washout of 1-3 months. Restart if migraines recur.
Why the 6-month limit? Flunarizine’s weak dopamine-receptor antagonism is cumulative. With >6 months of continuous use, the risk of drug-induced extrapyramidal side effects (parkinsonian tremor, bradykinesia, akathisia) rises, particularly in older patients. Planned washouts of 1-3 months allow dopaminergic receptor recovery.
Efecte Secundare
Very common (>10%):
- Creșterea în greutate (~15% of users; up to 5-10 kg over 6 months; mechanism: increased appetite via H1 blockade)
- Drowsiness, sedation (take at night; partially adapts over 2-4 weeks)
- Increased appetite
Common (1-10%):
- Mild depression, low mood (dopaminergic effect; more common in patients with history of depression)
- Lethargy, asthenia
- Gastric upset, dry mouth
- Galactorrhoea, hyperprolactinaemia (dopaminergic effect)
- Menstrual irregularities in women
Important long-term (months to years of continuous use):
- Drug-induced parkinsonism — tremor, rigidity, bradykinesia. Usually reversible within months of stopping. Risk rises steeply with continuous use >6 months, particularly in elderly patients. This is why the 6-month cap exists.
- Drug-induced depression — can be severe; mechanism dopaminergic. Most common in patients with a prior depression history.
- Tardive dyskinesia — rare; involuntary movements of face, tongue, or limbs; can be irreversible even after stopping. Uncommon at 6-month durations.
Contraindicații
- Current or history of depression
- Parkinson’s disease or other extrapyramidal disorder
- Hypersensitivity to flunarizine or piperazines
- Pregnancy and breastfeeding (insufficient safety data; dopaminergic drugs not recommended)
- Insuficiență hepatică severă
Interacțiuni medicamentoase
- Alcohol, benzodiazepines, opioids, sedating antihistamines — additive CNS depression
- Antipsychotics — additive dopamine blockade; avoid combination (extrapyramidal risk)
- Metoclopramide, prochlorperazine — dopaminergic; avoid prolonged co-use
- Beta-blocante — generally well-tolerated; can combine with propranolol for migraineurs needing combined prevention
Depozitare
Store below 25°C. Keep out of reach of children.
Întrebări frecvente
How long until Sibelium starts working?
6-8 weeks at target dose. Reductions of 50-70% in monthly migraine days are typical in responders. If no response at 8 weeks on 10 mg, switch agent (topiramate, propranolol, amitriptyline).
Why only 6 months of continuous use?
Flunarizine weakly blocks dopamine receptors. With continuous use beyond 6 months, the risk of drug-induced parkinsonism (tremor, rigidity, slowness) and depression rises. A planned washout of 1-3 months every 6 months allows dopaminergic recovery. If migraines remain controlled after a washout, you may not need to restart; if they recur, restart with a new 6-month course.
Will Sibelium make me gain weight?
Yes for about 15% of users — up to 5-10 kg over 6 months. Mechanism: antihistaminic appetite increase. If weight gain is concerning, topiramate (causes weight loss) or propranolol (weight-neutral) are alternatives.
Can I take Sibelium in pregnancy?
No — insufficient safety data and dopaminergic drugs are generally avoided in pregnancy. For pregnant migraineurs, propranolol is the preferred preventive; amitriptyline is a second option.
Is Sibelium safe for children?
Yes — flunarizine is one of the preferred migraine preventives in European paediatric neurology (age 5+), typically 5 mg at bedtime. Paediatric trials have shown similar efficacy to adult data. Same 6-month course limit applies.
Can Sibelium treat vertigo?
Yes — flunarizine is licensed for vestibular vertigo (Ménière’s, peripheral vertigo, vestibular migraine). The antihistaminic and calcium-channel-blocking actions reduce vestibular excitability. Dose is the same as for migraine.
Why isn’t Sibelium available in the US?
Janssen never pursued FDA approval. It is widely available in Europe, Asia, Latin America, and Canada as a first-line migraine preventive. US patients sometimes access it via international pharmacies.
Where can I buy Sibelium online?
You can buy Sibelium (flunarizine 5 mg / 10 mg, 30-180 tablet packs) from MedsBase with discreet packaging and worldwide shipping.
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| Concentrație | 5 mg, 10 mg |
|---|---|
| Cantitate | 30 Comprimat/e, 60 Comprimat/e, 90 Comprimat/e, 180 Comprimat/e |
Sibelium
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