Johnson & Johnson


Full Prescribing Info
Flunarizine HCl.
Sibelium also contains the following ingredients: Lactose, maize starch, talc, magnesium stearate and colloidal anhydrous silica. The capsule itself contains erythrosine sodium, yellow ferric oxide, titanium dioxide, black and red ferric oxide and gelatin.
Pharmacology: Flunarizine is a selective calcium antagonist. It prevents cellular calcium overload by reducing excessive transmembrane calcium influx. Flunarizine has no effect on contractility or conduction of the heart.
Pharmacokinetics: Flunarizine is well absorbed from the gut, reaching peak plasma levels within 2-4 hrs and reaching steady state at 5-6 weeks. After extensive hepatic metabolism, flunarizine and its metabolites are excreted through the feces via the bile. The mean terminal elimination half-life is about 18 days. Plasma protein-binding is 90%.
Prophylaxis of classic (with aura) or common (without aura) migraine. Symptomatic treatment of vestibular vertigo, due to a diagnosed functional disorder of the vestibular system.
Dosage/Direction for Use
Migraine Prophylaxis: Starting Dose: Treatment is started at 10 mg daily (at night) for patients <65 years and at 5 mg for patients >65 years. If during this treatment, depressive, extrapyramidal or other unacceptable adverse experiences occur, administration should be discontinued. If after 2 months of this initial treatment, no significant improvement is observed, the patient should be considered a nonresponder and administration should be discontinued.
Maintenance Dose: If the patient responds satisfactorily and if a maintenance treatment is needed, the dose should be decreased so that each week, he/she has 5 days treatment at the same daily dose and 2 successive drug-free days. Even if the prophylactic maintenance treatment is successful and well tolerated, it should be interrupted after 6 months and reinitiated only if the patient relapses.
Vertigo: The same daily doses should be used as for migraine, but the starting treatment should not be given longer than needed for symptom control, which generally takes <2 months. If however, no significant improvement is observed after 1 month for chronic vertigo or after 2 months for paroxysmal vertigo, the patient should be considered a nonresponder and administration should be discontinued.
Symptoms: On the basis of the pharmacological properties of Sibelium, sedation and asthenia may be expected to occur. A few cases of acute overdosage (up to 600 mg in 1 intake) have been reported and the observed symptoms were sedation, agitation and tachycardia.
Treatment: There is no specific antidote. Within the 1st hour after ingestion, gastric lavage may be performed. Activated charcoal may be given if considered appropriate.
Patients with a history of depressive illness, or with preexisting symptoms of Parkinson's disease or other extrapyramidal disorders (see Adverse Reactions).
Special Precautions
This treatment may give rise to extrapyramidal and depressive symptoms and reveal Parkinsonism, especially in predisposed patients eg, the elderly. Therefore, it should be used with caution in such patients.
In rare cases, fatigue may increase progressively during Sibelium therapy. In this event, the therapy should be discontinued.
The recommended dose should not be exceeded. Patients should be seen at regular intervals, especially during maintenance treatment, so that extrapyramidal or depressive symptoms may be detected early and if so, treatment discontinued. If during maintenance treatment, the therapeutic effects wane, treatment should also be discontinued (for duration of treatment, see also Dosage & Administration).
Effects on the Ability to Drive or Operate Machinery: Since somnolence may occur, especially at the start of the treatment, caution should be exercised during activities eg, driving or operating dangerous machinery.
Use in pregnancy & lactation: The safety of Sibelium for use in human pregnancy has not been established. An evaluation of animal studies does not indicate direct or indirect harmful effects with respect to reproduction, development of the embryo or fetus, the course of gestation or peri- and postnatal development.
Studies in lactating dogs have shown that Sibelium is excreted in the milk and that the concentration in the milk is greater than in the plasma. No data are available on the excretion in human breast milk. Nursing should therefore be discouraged in women taking Sibelium.
Adverse Reactions
The most frequent adverse experiences are drowsiness and/or fatigue (20%) which are generally transient, and also weight gain (and/or increased appetite) (11%).
The following serious adverse experiences may occur during chronic treatment: Depression of which female patients with a history of depressive illness may particularly be at risk.
Extrapyramidal symptoms (eg, bradykinesia, rigidity, akathisia, orofacial dyskinesia, tremor) of which elderly patients seem particularly at risk.
Infrequently reported adverse experiences are: Gastrointestinal: Heartburn, nausea, gastralgia.
Central Nervous System: Insomnia, anxiety.
Others: Galactorrhoea, dry mouth, muscle ache, skin rash.
Drug Interactions
Excessive sedation can occur when alcohol, hypnotics or tranquilisers are taken simultaneously with Sibelium.
Sibelium is not contraindicated in patients who use β-blocking agents.
Store between 15°C and 30°C.
ATC Classification
N07CA03 - flunarizine ; Belongs to the class of antivertigo preparations.
Cap (red and grey) 5 mg x 200's.
Register or sign in to continue
Asia's one-stop resource for medical news, clinical reference and education
Sign up for free
Already a member? Sign in