Active Ingredient

Flunarizine

Flunarizine is a medication that belongs to the class of calcium channel blockers. It is commonly used to help manage certain conditions involving blood flow and nerve function.

This medication is often prescribed for individuals experiencing migraines or issues related to balance and dizziness.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Flunarizine Brands

Sibelium

Strengths 5 mg, 10 mg

Flunarizine Uses

Flunarizine is typically used to manage conditions that affect blood flow and nerve signals. It is often prescribed for:

Prevention of migraine headaches
Management of vertigo associated with vestibular disorders
Relief from certain types of dizziness
Support in managing certain circulatory disorders

How Flunarizine Works

Flunarizine works by blocking specific calcium channels in the brain. This action helps to reduce the excessive electrical activity that can lead to migraines.

By preventing calcium from entering cells, Flunarizine helps to stabilize nerve activity and improve blood flow, which can alleviate symptoms of dizziness and vertigo.

Common side effects of Flunarizine

Not everyone experiences side effects with Flunarizine, and many side effects are mild and temporary. Common side effects include:

Drowsiness
Weight gain
Increased appetite
Stomach upset
Dry mouth
Fatigue
Depression

If you experience serious or persistent side effects, it is important to contact your doctor.

Avoid activities that require full alertness if you feel drowsy after taking Flunarizine.
Limit alcohol consumption as it may increase drowsiness and other side effects.
Inform your doctor about any other medications or supplements you are taking to avoid potential interactions.
Do not stop taking this medication suddenly without consulting your doctor.
Be cautious if you have a history of depression or movement disorders.

Always consult with your doctor or healthcare provider for personalized advice and guidance.

Frequently Asked Questions

What is Flunarizine used for?

Flunarizine is primarily used for the prevention of migraine headaches and to manage vertigo and dizziness associated with certain conditions.

How long does it take for Flunarizine to work?

The effects of Flunarizine may take a few weeks to be noticeable. It is important to continue taking it as prescribed by your doctor.

Can Flunarizine cause weight gain?

Yes, weight gain is a possible side effect of Flunarizine. Monitoring your weight and discussing any concerns with your doctor is advisable.

Is it safe to drink alcohol while taking Flunarizine?

It is best to limit alcohol consumption while taking Flunarizine, as alcohol can increase drowsiness and other side effects.

Can I stop taking Flunarizine if I feel better?

You should not stop taking Flunarizine without consulting your doctor, even if you feel better, as it may need to be tapered off gradually.