NimodipineNicotinic AcidsCalcium Channel BlockersAdministration, OralVasospasm, IntracranialAdministration, IntravenousBrain IschemiaCerebrovascular CirculationRats, Sprague-DawleyDihydropyridinesDose-Response Relationship, DrugSubarachnoid HemorrhageDrug Administration ScheduleInjections, IntravenousFlunarizineTime FactorsCalcium Channels, L-TypeCalcium Channels