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Flunarizine is used to prevent migraine

How it works

Migraine headaches are thought to result from the dilatation of blood vessels in the head. Flunarizine works by preventing loss of tone and dilation of blood vessels, thus preventing the migraine headache.

Common side effects

Fatigue, Weight gain, Muscle pain, Constipation, Abdominal pain upper, Nausea, Sleepiness, Insomnia (difficulty in sleeping), Rhinitis

Available Medicine

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Expert advice

Do not start or continue the flunarizine tablets:
  • If you are allergic (hypersensitive) to flunarizine.
  • If you have Parkinson’s disease.
  • If you have liver disease.
  • If you are suffering from depression.
  • If you are pregnant or breast feeding.
Do not drive or operate machinery after taking Flunarizine because you may feel drowsy.

Frequently asked questions



Is flunarizine safe?
Flunarizine is safe if used at prescribed doses for the prescribed duration as advised by the doctor.


Is flunarizine safe in pregnancy?
There are no data on the use of flunarizine in pregnant women. It is hence advisable to avoid the use of flunarizine during pregnancy. Ask your doctor before taking flunarizine in pregnancy.


What is flunarizine?
Flunarizine is a calcium channel blocker, and was initially used to improve blood flow. It was later used to treat dizziness and vertigo, and to prevent migraine.

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What is flunarizine used for?
Flunarizine is used to prevent migraine attacks. Migraine is a recurrent throbbing headache that typically affects one side of the head and is often accompanied by nausea and disturbed vision.


Does flunarizine cause weight gain?
Flunarizine can cause weight gain. It is caused by an increase in appetite (feeling hungry) and can be avoided by keeping to your usual diet. Please consult your doctor if you experience weight gain after taking flunarizine.


Does flunarizine work?
Flunarizine works if used at prescribed doses for the prescribed duration as advised by your doctor.


How long does flunarizine take to work?
Flunarizine may start working at eight to twelve weeks. Always talk to your doctor before starting the medicine and for how long it needs to be taken. If the medicine works for you, keep taking the tablets for at least six months.

Content on this page was last updated on 27 March, 2017, by Dr. Varun Gupta (MD Pharmacology)