Sibelium (Flunarizine) – Patient Information (Australia)

Sibelium is a medicine containing flunarizine. It is commonly used to help prevent certain types of headaches, particularly migraine. This page explains how Sibelium works, typical uses, how to take it safely, and what to consider with other medicines, alcohol, food, and lifestyle.

Important: If you have specific questions about whether Sibelium is suitable for you, speak with a qualified healthcare professional.

1) Basic product information

2) What Sibelium is and how it works (mechanism of action)

Flunarizine belongs to a group of medicines sometimes described as calcium channel blockers (with additional anti-migraine effects). Its exact mechanism in migraine is complex, but it is thought to help by:

• Reducing abnormal signalling in brain pathways involved in migraine.
• Modifying calcium-related processes that influence nerve cell excitability.
• Stabilising neurotransmitter activity (chemical messengers) that may contribute to migraine attacks.
• Supporting balance pathways when used for certain vertigo conditions.

Key point: Sibelium is generally used to prevent attacks. It is not typically intended as a fast treatment for an ongoing migraine attack.

3) Pharmacokinetics (how the body handles flunarizine)

Pharmacokinetics describe how a medicine is absorbed, distributed, metabolised, and eliminated.

• Absorption: Flunarizine is absorbed after oral dosing. Food may affect the speed of absorption for some people, but the overall effect is usually not dramatic.
• Distribution: It can accumulate in body tissues. Because of this, effects may build over time.
• Metabolism: It is processed mainly by the liver (metabolised by liver enzymes).
• Elimination: Flunarizine and its metabolites are removed from the body through urine and/or bile. Elimination may be relatively slow.
• Half-life / duration of effect: The medicine may remain in the body for extended periods, which is one reason it can be taken once daily for prevention in many regimens.

Clinical implication: If you start Sibelium, it may take some time to notice benefits, and when stopping, your clinician may advise a gradual or planned approach depending on your situation.

4) Typical use and indications

Sibelium (flunarizine) is used for conditions where preventing attacks is important.

4.1 Migraine prevention

• Prevention of migraine in people who experience frequent or troublesome attacks.
• May be considered when other preventative strategies are unsuitable or not fully effective.

4.2 Vertigo and balance-related disorders

• In some settings, flunarizine has been used to help prevent or reduce symptoms of certain types of vertigo (dizziness/rotational sensation), including conditions described as vestibular migraine or other recurrent vertigo syndromes.

Note: The exact approved indications can vary by country and by product registration status. In Australia, availability and prescribing practices may follow local product information and clinician assessment.

5) Timing: when to take Sibelium

Many people take flunarizine once daily, typically in the evening because it may cause drowsiness in some individuals.

• Best time: Often in the evening, especially if you feel sleepy after taking it.
• Consistency: Take it at the same time each day to maintain steady levels.
• If you miss a dose: Take it when you remember unless it is close to the next dose. Do not double up.

If you are unsure about the timing for your specific regimen, confirm with your healthcare professional.

6) Food interactions

There are no universal “must avoid” foods with flunarizine for most people. However, as with many medicines, some general tips may help:

• With or without food: Many people take it with water and may take it with food if it causes mild stomach discomfort.
• Watch for side effects: If you notice nausea or dizziness, taking it with a light meal may be helpful.

Practical tip: Keep your usual routine stable (either always with food or always without food) unless your healthcare professional advises otherwise.

7) Alcohol and medicine interactions

7.1 Alcohol

Because flunarizine can cause drowsiness or fatigue in some people, combining it with alcohol may increase sedation, dizziness, and impaired coordination.

• It is generally best to limit alcohol or avoid it if you notice sleepiness after taking Sibelium.
• Avoid activities requiring full alertness (such as driving) if you feel drowsy.

7.2 Interactions with other medicines

Flunarizine is processed by the liver, so medicines that strongly affect liver enzymes or cause sedation may interact.

Talk to your pharmacist or doctor about any medicines you take, especially:

• Sedatives or sleep medicines (for example, benzodiazepines, some sleeping tablets) – may increase drowsiness.
• Other migraine preventatives – sometimes can be combined, but the plan should be individualised.
• Antidepressants or antipsychotics – discuss risks, especially for mood or movement-related side effects.
• Medicines that affect the nervous system – may add to dizziness or sedation.
• Medicines affecting liver metabolism – could change flunarizine levels.

Always tell healthcare professionals about all medicines, vitamins, and herbal products you use. This includes occasional medicines and “over-the-counter” products.

8) Dosing: typical regimen (general guidance)

Dosing can vary depending on age, condition, and response. The information below provides general guidance; your clinician will decide what is right for you.

8.1 Adults

• For migraine prevention and related conditions, a common regimen is once daily, often in the evening.
• Some patients may require dose adjustments based on effectiveness and side effects.

8.2 Older adults

• Older adults may be more prone to side effects (including sedation and movement-related effects), so dosing decisions are usually more cautious.

8.3 Children and adolescents

• Use in children depends on local product information and clinical judgement. Always follow clinician guidance for the appropriate age group and dose.

How to take: Swallow the tablet with water. Do not change your dose without medical advice.

9) Safety profile and possible side effects

Like all medicines, Sibelium (flunarizine) can cause side effects. Many people tolerate it well, especially at appropriate doses, but it is important to know what to watch for.

9.1 Common side effects

• Drowsiness or fatigue
• Dizziness
• Weight gain in some people
• Dry mouth or mild gastrointestinal upset (may occur)
• Headache or mood changes (less common than drowsiness)

9.2 Less common but important side effects

• Movement disorders (such as tremor or stiffness) – more likely with prolonged use or higher susceptibility
• Extrapyramidal symptoms (involuntary movements) may occur in some individuals
• Depression or mood changes
• Palpitations or changes in heart rhythm are uncommon but require medical assessment

9.3 Seek urgent medical help if

• You experience severe allergic symptoms (swelling of face/lips, breathing difficulty, widespread rash).
• You develop unusual weakness, fainting, severe drowsiness that affects breathing/alertness.
• There are signs of severe neurologic reactions (rapid worsening involuntary movements, severe rigidity, confusion).

9.4 Long-term use considerations

Some people who use flunarizine for long periods may develop tolerance to benefit or be at higher risk of movement-related side effects. Clinicians may recommend periodic review to determine whether continued treatment is worthwhile.

10) Practical use tips (getting the best results safely)

• Give it time: Preventive medicines often take several weeks to show full benefit. Track your headaches or dizziness symptoms.
• Track triggers and frequency: Use a simple diary or app—note headache days, severity, duration, and triggers.
• Choose evening dosing if sleepy: If you feel drowsy, taking it at night can help.
• Be cautious with driving: If you feel dizzy or drowsy, avoid driving or operating machinery until you know how you respond.
• Maintain hydration and regular meals: These lifestyle factors can influence migraine frequency.
• Review weight changes: If you notice increasing weight, discuss with your healthcare professional—diet and activity adjustments may help.
• Do not stop suddenly without advice: If you have been taking it regularly, ask a clinician about the safest way to discontinue.

11) Alternative options for migraine prevention (non-exhaustive)

Preventing migraines often involves a personalised plan. Alternatives to flunarizine may include both medication and non-medication strategies.

11.1 Other medicine options

• Beta-blockers (for some people)
• Anticonvulsants used for prevention (selected patients)
• Antidepressants for prevention in certain cases
• Calcitonin gene-related peptide (CGRP)–targeting treatments (some are long-acting; available depending on indication and access)
• Botulinum toxin injections for chronic migraine in appropriate patients

11.2 Non-medicine options

• Lifestyle adjustments (sleep regularity, stress management, hydration)
• Physiotherapy and posture care if neck-related triggers contribute
• Cognitive or behavioural strategies (biofeedback, relaxation training)
• Trigger tracking and consistent routines

Your clinician can help determine which alternatives suit your history, other conditions, and preferred balance between benefits and side effects.

12) Australia: market, legal and guidance context

In Australia, medicines are regulated under the Therapeutic Goods Administration (TGA). Availability and how medicines are prescribed or supplied can depend on the product registration status, approved indications, and clinical guidelines.

For migraine prevention and vertigo disorders, clinical practice in Australia typically involves:

• Assessment of headache type and frequency
• Review of risk factors and side effect profile
• Consideration of evidence-based preventive therapies and patient preferences
• Regular review of benefit versus adverse effects

Recent guidance note: Migraine prevention guidance in recent years has increasingly focused on (1) accurate diagnosis (including migraine subtypes), (2) preventing medication overuse, and (3) incorporating newer targeted therapies where appropriate. Flunarizine may still be considered in some settings, particularly when it aligns with individual patient factors and clinician assessment.

13) Delivery and availability (online pharmacy)

Availability may vary based on supplier stock, formulation, and strength. When you order online in Australia, delivery timelines depend on the dispatch location and courier services.

• Typical delivery: Often includes standard and express options.
• Packaging: Medicines are usually supplied in appropriate, sealed packaging for protection during transit.
• Cold chain: Generally not required for flunarizine tablets.

If a product is temporarily out of stock, the pharmacy may offer an estimated restock time or alternative product options.

14) FAQ

What is Sibelium used for?

Sibelium (flunarizine) is used mainly as a preventive medicine for migraine. It may also be used for certain recurrent vertigo or balance-related conditions, depending on clinical judgement and local product guidance.

Does Sibelium stop a migraine once it has started?

Typically, Sibelium is intended to help prevent migraines rather than treat an attack that has already begun. For acute migraine relief, other medicines are usually used.

How long does it take to work?

Some people notice changes within weeks, but preventive effects may take several weeks. Track headache frequency and severity to judge effectiveness.

Why do I feel sleepy after taking it?

Drowsiness is a known possible side effect. Taking the dose in the evening and avoiding alcohol may help. If sleepiness is significant, contact your healthcare professional.

Can I take Sibelium with food?

Many people can take flunarizine with or without food. If it upsets your stomach, taking it with a light meal may be more comfortable.

Can I drink alcohol while taking Sibelium?

Alcohol may increase drowsiness and dizziness. It is often best to limit alcohol or avoid it, especially until you know how Sibelium affects you.

What should I do if I miss a dose?

Take it when you remember unless it is close to your next scheduled dose. Do not double dose to make up for the missed tablet.

What side effects should I watch for?

Common side effects include sleepiness, dizziness, and weight changes. Seek medical advice promptly if you notice new mood symptoms or movement-related problems such as tremor or stiffness.

Are there safer alternatives if I can’t tolerate it?

There may be other preventive treatments for migraine and vertigo. Your clinician can discuss options based on your medical history, comorbidities, and side effect risk.

Is flunarizine suitable for everyone?

No medicine is suitable for everyone. Your healthcare professional will consider your age, other conditions, history of side effects, and medicines you take to decide if flunarizine is appropriate.

15) Summary

Sibelium (flunarizine) is a preventive medicine most commonly used for migraine and sometimes for recurrent vertigo syndromes. It works by influencing nerve signalling pathways involved in migraine and balance. Many people take it once daily—often at night—because it can cause drowsiness. As with all medicines, it’s important to review side effects, avoid excess alcohol, and check for interactions with other therapies.

If you have questions about how to use Sibelium safely or how it may fit into your migraine prevention plan, consult a qualified healthcare professional.