About flunarizine hydrochloride
Calcium-channel blocker; migraine preventive
Used for
- Prevention of migraine attacks
- Treatment of vertigo from vestibular disorders
Usual adult dose
Migraine prevention: usually 10 mg once nightly under age 65; 5 mg nightly at 65 or older.
Usual dose in children
Migraine prevention: typically 5 mg nightly for ages 5–12; specialist supervision is recommended.
Common side effects
- Sleepiness or fatigue
- Increased appetite and weight gain
- Depression or low mood
- Movement problems, including tremor or stiffness
Important warnings
- May worsen or trigger depression; avoid with current or recurrent depression.
- Can cause or worsen Parkinson-like movement disorders; avoid with Parkinson’s disease.
- Stop if depression or movement symptoms develop; prolonged use requires review.
- May impair alertness; use caution with driving and alcohol.
Pregnancy
Safety is not established; generally avoided during pregnancy unless a clinician determines it is necessary.
Breastfeeding
Information is limited; breastfeeding is generally not recommended during treatment.
Interactions
- Alcohol and sedatives can increase drowsiness.
- Some medicines affecting liver enzymes may alter flunarizine levels.
- Other medicines causing movement disorders may increase neurological risks.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.