Nimodipine extended-release tablets can treat cerebral blood supply deficiency. Nimodipine extended-release tablets can be used for the prevention and treatment of cerebral vasospasm complicated by subarachnoid hemorrhage, the prevention of vascular headache attacks, the treatment of ischemic cerebrovascular disease, ischemic sudden deafness. It can effectively regulate the level of intracellular calcium to maintain normal physiological function. The effect on cerebral blood vessels is especially prominent, can effectively prevent and treat ischemic damage to brain tissue caused by cerebral vasospasm due to subarachnoid out, inhibit the inward flow of calcium ions outside the vascular smooth muscle cells, and have a dilating effect on cerebral arteries in isolation or in vivo, and cerebral arteries with normal or ischemic blood. It selectively dilates cerebral blood vessels at appropriate doses and hardly affects peripheral blood vessels. Therefore, Nimodipine Extended-Release Tablets can treat insufficient cerebral blood supply. The use of this drug may cause adverse reactions such as heat sensation, skin flushing, drop in blood pressure, etc. Patients are advised to stop the drug in time for treatment. It is contraindicated for patients with severe hepatic impairment. In addition, patients are advised to use Nimodipine Extended-Release Tablets under medical supervision.