Flunarizine — Uses, Dosage, Side Effects & Safety
Drug class: Calcium channel blocker (selective, non-dihydropyridine); Antimigraine agent
Overview
Flunarizine is a medication primarily used to prevent migraine headaches and manage certain types of vertigo. It works by blocking calcium entry into nerve cells, which helps reduce the frequency and severity of migraine attacks and dizziness episodes. This medicine is not intended for the immediate relief of acute migraine attacks but is used as a preventive (prophylactic) treatment. Patients may notice a reduction in migraine frequency after several weeks of regular use. Key points to remember: Flunarizine should be taken consistently as prescribed, and it may take a few weeks to see full benefits. It is important to discuss any history of depression or movement disorders with your doctor before starting this medication.
Therapeutic uses
- Migraine prophylaxis
- Vertigo (vestibular origin)
- Peripheral vascular disease
- Cerebrovascular disorders
Common side effects
- Drowsiness
- Weight gain
- Depression
- Extrapyramidal symptoms
- Fatigue
- Insomnia
- Gastric pain
Frequently Asked Questions about Flunarizine
How long does it take for flunarizine to work?
It may take several weeks (typically 4–8 weeks) of regular use to notice a reduction in migraine frequency or vertigo symptoms. Continue taking the medication as prescribed, even if you do not see immediate results.
Can flunarizine be used for acute migraine attacks?
No, flunarizine is not effective for treating acute migraine attacks. It is used as a preventive medication to reduce the frequency and severity of migraines.
Is flunarizine safe during pregnancy or breastfeeding?
Flunarizine should be used during pregnancy or breastfeeding only if clearly needed and prescribed by your doctor. Safety data in these populations are limited.
What should I do if I experience drowsiness while taking flunarizine?
If you feel excessively drowsy, avoid driving or operating machinery. Talk to your doctor if drowsiness is severe or persistent, as a dose adjustment may be needed.
Can flunarizine cause depression?
Yes, flunarizine can cause or worsen depression, especially in people with a history of mood disorders. Notify your doctor immediately if you experience mood changes or depressive symptoms.
What are the signs of serious side effects with flunarizine?
Serious side effects include severe depression, suicidal thoughts, involuntary movements (such as tremors or stiffness), confusion, or signs of liver problems (yellowing of skin/eyes). Seek medical attention if these occur.
Is flunarizine available in the United States?
No, flunarizine is not currently approved or available in the United States.
Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.