Sibelium (Flunarizine) – Patient Information (Australia)

Sibelium is a brand of flunarizine, a medicine used mainly to prevent certain types of migraine and to help with some balance-related conditions. This page explains what Sibelium is, how it works, how it is taken, and important safety information for patients in Australia.

Key product information

Note: Brand availability can vary. Your pharmacist can confirm the exact product strength and formulation you receive.

How Sibelium works (mechanism of action)

Flunarizine helps prevent migraine attacks by influencing several processes involved in migraine. While the exact mechanism of anti-migraine benefit is complex, flunarizine is thought to:

• Block calcium entry into cells (a “calcium channel blocker”), which can reduce abnormal neuronal activity.
• Modulate blood vessel-related changes that are linked to migraine symptoms.
• Stabilise pathways involved in the migraine attack, helping to reduce frequency and severity for some people.

Because it works on prevention, Sibelium is generally used regularly rather than as a “rescue” medicine during an attack.

Pharmacokinetics (how the body handles flunarizine)

Understanding pharmacokinetics can help explain dosing and why side effects such as sleepiness may occur early in treatment.

• Absorption: Flunarizine is absorbed after oral dosing.
• Distribution: It is distributed throughout the body, including into tissues.
• Metabolism: The medicine is metabolised (broken down) primarily by the liver.
• Elimination: Flunarizine and its metabolites leave the body via both urine and faeces.
• Half-life / persistence: Flunarizine can remain in the body for a relatively long time. This contributes to the “steady” preventive effect and also to the possibility of side effects accumulating with continuous daily use.

Clinical takeaway: It may take some weeks to notice the full preventive benefit, and dose adjustments may be considered if side effects occur.

What Sibelium is typically used for

In Australia, flunarizine is commonly used for conditions including:

• Migraine prophylaxis: prevention of migraine attacks (particularly in patients where prevention is appropriate).
• Some balance-related disorders: historically used in selected patients with vestibular (balance) symptoms such as vertigo, depending on clinician evaluation and local prescribing practice.

Use may vary based on clinical guidelines, availability, and individual patient factors. Your pharmacist can help you understand why it was chosen for you.

When to take it (timing and how to build a routine)

Flunarizine is often taken in the evening because it can cause drowsiness or sleepiness in some people—especially when starting treatment.

• First weeks: Try taking it at night to reduce impact on daytime activities.
• Consistency: Take it at the same time each day to maintain steady levels.
• Give it time: Preventive effects are usually evaluated after a period of consistent use rather than after a single dose.

If you miss a dose: Take it when you remember unless it is close to the next scheduled dose. Do not double up.

Dosing overview (general guidance)

Dose varies by age, indication, and tolerance. Always follow the instructions provided with your medicine.

Typical starting approach (general):

• Adults: Commonly started at a once-daily dose, often in the evening.
• Older adults: May require a lower dose or more cautious titration due to higher risk of side effects.
• People with liver impairment: Dose and monitoring may be adjusted, as metabolism is mainly hepatic.

Your clinician may adjust your dose depending on your response and side effects. Do not increase the dose without medical advice.

Practical note: Because flunarizine can remain in the body, it’s important not to take extra tablets to “catch up” after missed doses.

Food interactions

Flunarizine can generally be taken with or without food. Food does not commonly make a major difference to effectiveness for most patients.

• If it upsets your stomach, take it after a meal.
• If it makes you sleepy, taking it in the evening may help.

Tip: Keep your usual routine consistent. If you change how and when you take it, monitor for any change in side effects.

Alcohol and medicine interactions

Alcohol can increase sleepiness and impair reaction time. When combined with flunarizine, alcohol may make fatigue and drowsiness more noticeable.

• Avoid or limit alcohol while you are adjusting to Sibelium.
• If you choose to drink, do so carefully and avoid driving or operating machinery if you feel affected.

Other medicines to discuss with your pharmacist or doctor

Some medicines may increase sedation or affect metabolism in ways that alter how flunarizine works. It is especially important to tell your healthcare professional about:

• Medicines that cause drowsiness (sedatives, sleeping tablets, some antihistamines, and some anxiety medications).
• Drugs that affect liver metabolism (certain medicines can change flunarizine levels).
• Medicines used for nervous system conditions (because of potential overlapping neurological side effects).

Always check interactions when starting a new medicine, including over-the-counter products.

Indications (who may benefit)

Sibelium is indicated for prevention of migraine and has been used for selected balance-related problems. In practice, suitability depends on:

• Your migraine pattern (frequency, severity, and impact on daily life)
• Whether you have tried other preventive options
• Your medical history and risk factors for adverse effects
• Other medicines you take (to reduce interaction risk)

Important: Flunarizine is a preventive medicine. It is not intended to stop an ongoing migraine attack once it has started.

Safety profile and side effects

Like all medicines, Sibelium (flunarizine) can cause side effects. Many are mild and improve as your body adjusts, but some require prompt medical attention.

Common or expected side effects

• Sleepiness / drowsiness
• Weight gain or increased appetite
• Fatigue
• Dry mouth or mild gastrointestinal symptoms (in some people)
• Dizziness (may occur early in treatment)

Less common but important neurological effects

Flunarizine can, in some people, affect movement and cause symptoms such as:

• Tremor
• Muscle stiffness
• Restlessness or slowed movements
• Changes in mood, including depressed mood in some patients

Seek medical advice promptly if you notice new movement changes, worsening tremor, or mood changes.

Serious side effects (seek urgent care)

• Allergic reaction such as swelling of the face/lips, rash with breathing difficulty
• Severe dizziness, fainting, or significant worsening of balance
• Uncontrolled abnormal movements or severe confusion

Who may be at higher risk?

• Older adults (higher risk of sedation and movement-related effects)
• People with pre-existing movement disorders (such as Parkinsonian symptoms)
• People with liver impairment (greater chance of accumulation/side effects)
• People taking other sedating medicines

Practical use tips for patients

• Start in the evening: If drowsiness occurs, night-time dosing often helps.
• Be cautious with driving: Avoid driving or operating machinery until you know how Sibelium affects you.
• Track your migraines: Keep a diary of headache days, severity, and triggers to assess benefit.
• Give it time: Preventive benefit may take several weeks; early changes help evaluate whether to continue or adjust.
• Monitor weight: If you notice rapid weight gain, discuss with your pharmacist or clinician.
• Report movement or mood changes: Tell your healthcare professional promptly.
• Do not stop suddenly without advice: If discontinuation is needed, it’s often managed with guidance.

When to seek medical advice

Contact a healthcare professional if you experience:

• Persistent or worsening sleepiness affecting daily activities
• Unusual movement symptoms (tremor, stiffness, restlessness)
• New or worsening depression, anxiety, or significant mood changes
• Signs of an allergic reaction
• Any concern about interactions with other medicines

Alternative options (other medicines for migraine prevention and vertigo-related symptoms)

Depending on the condition and your individual risk factors, other preventive approaches may be considered. Alternatives can include:

Migraine prevention options (examples)

• Beta-blockers (e.g., propranolol)
• Antiepileptic drugs (e.g., topiramate)
• Tricyclic antidepressants (e.g., amitriptyline) for some patients
• CGRP-targeting therapies (in selected patients, administered in different ways)
• Botulinum toxin for chronic migraine (in selected patients)

Non-medicine options that may help

• Lifestyle changes: regular sleep, hydration, stress management
• Trigger management: identifying and reducing individual triggers
• Physiotherapy or vestibular rehabilitation for balance symptoms (where appropriate)

Your pharmacist can discuss what options might suit you based on your medical history and current medications.

Australia market and legal context (what it means for you)

Medicine availability and classification in Australia are governed by the Australian Register of Therapeutic Goods (ARTG) and related regulatory frameworks. Flunarizine products may be available through different prescribing and supply pathways depending on formulation and schedule.

Online pharmacy delivery generally follows Australian consumer and regulatory requirements. Availability, pack size, and supply timing may vary by wholesaler stock.

Recent guidance to consider: In recent years, Australia has continued to emphasise safe supply practices, proper patient counselling, and interaction checking—particularly for medicines that can cause sedation or affect the nervous system. For migraine prevention, clinicians also consider updated evidence on newer preventive therapies and personalised treatment plans.

Patient reminder: Always confirm the exact product name, active ingredient (flunarizine), strength, and dosing instructions on your dispensing label.

Delivery and availability in Australia

Availability of Sibelium (flunarizine) can vary by region and supplier. Online pharmacies typically:

• Confirm stock and expected delivery times before dispatch
• Pack medicines securely to protect tablets/capsules
• Use trackable shipping where possible

Delivery timeframe: This depends on the pharmacy, your location, and supplier turnaround. Your checkout information or order confirmation usually provides an estimate.

Storage: Store at controlled room temperature as directed on the pack. Keep out of reach of children.

FAQ

1) What is Sibelium (flunarizine) used for?

Sibelium is mainly used for migraine prevention and may be used for certain balance-related conditions depending on clinical assessment. It is typically not used to stop an individual migraine attack once it has started.

2) How long does it take to work?

Preventive medicines often take several weeks to show benefit. If you notice side effects early, speak with a healthcare professional promptly rather than waiting.

3) Should I take Sibelium with food?

It can usually be taken with or without food. If it makes you nauseous or upsets your stomach, taking it after a meal may help.

4) Can I drink alcohol while taking flunarizine?

Alcohol may increase drowsiness and reduce coordination. It’s best to limit or avoid alcohol until you know how Sibelium affects you.

5) What if I feel very sleepy?

Sleepiness is common, especially when starting. Taking the dose in the evening and avoiding driving or alcohol can help. If sleepiness is severe or persists, contact your pharmacist or clinician for advice.

6) Are there any interactions with other medicines?

Yes. Medicines that cause sedation or those that affect liver metabolism may interact. Tell your pharmacist about all medicines you take, including over-the-counter products and supplements.

7) Can Sibelium cause weight gain?

Weight gain or increased appetite can occur in some patients. If you notice significant or rapid weight changes, discuss this with your pharmacist or clinician.

8) What side effects should worry me?

Seek medical advice promptly for new movement symptoms (tremor, stiffness, restlessness), significant mood changes, or signs of allergy. Get urgent help if symptoms are severe.

9) What should I do if I miss a dose?

Take it when you remember unless it’s close to the next dose. Don’t take double the amount.

10) What are common practical tips to get the best results?

• Take it at the same time each day, often in the evening
• Track migraine days and symptoms
• Avoid alcohol and be cautious with driving
• Report unusual neurological or mood symptoms early

Final note: This information is designed to help you understand Sibelium (flunarizine). Your pharmacist or healthcare professional can tailor advice to your situation, including the safest schedule and monitoring plan.