Zerograin 10 Tablet contains Flunarizine 10mg, a calcium channel blocker primarily indicated for the prophylaxis of migraine headaches and the management of vertigo associated with vestibular disorders. Flunarizine exerts its therapeutic effects by inhibiting the influx of calcium ions into vascular smooth muscle and neuronal cells, thereby stabilizing vascular tone and reducing neuronal excitability. This action helps prevent the onset of migraine attacks and alleviates symptoms of dizziness and imbalance. Zerograin 10 is typically prescribed for adults and should be used under medical supervision due to potential side effects such as drowsiness, weight gain, and extrapyramidal symptoms in susceptible individuals. It is contraindicated in patients with a history of depression, Parkinson’s disease, or severe hepatic impairment. The usual dosage is one tablet daily, preferably taken at night to minimize daytime sedation. Patients are advised to avoid alcohol and other central nervous system depressants during treatment. Regular monitoring is recommended to assess therapeutic response and detect any adverse effects early. Zerograin 10 Tablet offers an effective option for patients requiring long-term migraine prophylaxis or management of vestibular vertigo, improving quality of life through symptom control.