Calcium channel blockers for Sustained release delivery system are adapted for the object into cerebrospinal fluid. The transportation system include in solid dispersion product calcium channel blockers mixing (I) first poly(lactide-co-glycolide) there is molecular weight distribution to concentrate on one first number-average molecular weight MN1 and (II) second poly(lactide-co-glycolide) there is molecular weight distribution to concentrate on the 2nd number-average molecular weight to alloy, wherein MN1 is from 1. in 1 2000 to 3000 gram/mol of ratio and Mn1/Mn28 to 3.5. The transportation system filling about the display vasopasm of adjacent blood vessel or suspect exploitation vasopasm.
