<prompt> Calcium channel blocker causing cerebral vasodilatation is:-NimodipineFelodipineAmlodipineNitrendipine  <response>: Nimodipine DHPs- Blocks Ca2 channel only in cerebral blood vessels-Cerebral vasodilation Used in subarachnoid hemorrhage SAH. Felodipine is approved for Tx of Raynauds disease. Amlodipine has higher oral bioavailability- used in hypeension Nitrendipine - it has been shown to release NO from endothelium inhibit cAMP phosphodiesterase - vasodilation - indicated in hypeension angina pectoris. 