Migraine Prophylaxis with Flunarizine
Efficacy and Place in Therapy
- The American Academy of Neurology and other guideline societies position flunarizine as a second-line medication for migraine prophylaxis, after first-line options including beta blockers, topiramate, and candesartan 1
- Flunarizine (10 mg/day) has proven efficacy in migraine prevention and is commonly used in countries where it is available 2, 3
Dosing Considerations
- The standard effective dose is 10 mg daily, typically administered at night to minimize daytime sedation 2, 4
- Clinical benefit may take 2-3 months to manifest, so an adequate trial period is necessary before determining efficacy 3
Side Effects and Safety Concerns
- Common adverse events include sedation/somnolence 2, 4, weight gain 2, 4, and abdominal pain 2, 4
- More serious concerns include depression, particularly in elderly patients 2, 4, and extrapyramidal symptoms, more commonly observed in elderly persons 2, 4
Clinical Decision Algorithm
- Evaluate if patient meets criteria for migraine prophylaxis, including two or more attacks per month with disability lasting 3+ days per month 5
- Try first-line agents before considering flunarizine, including beta blockers, topiramate, and candesartan 1
- Consider flunarizine as a second-line option if first-line agents fail or are contraindicated, and patient has no history of depression and is not elderly 1, 2, 4