Flunarizine dihydrochloride is primarily used in the treatment of migraine prophylaxis, helping to reduce the frequency and severity of migraine attacks. It works by stabilizing blood vessels and preventing excessive constriction or dilation, which can trigger migraines. Additionally, it is employed in managing vertigo and dizziness associated with vestibular disorders, as it improves blood flow to the inner ear and stabilizes neuronal activity. Its calcium channel-blocking properties also make it useful in certain cases of peripheral vascular diseases, where it enhances circulation. The compound is often prescribed for long-term use, providing sustained relief for chronic conditions.