Objective To test the dissolution rate of nimodipine oral solid preparation in different media,and evaluate the test method.Methods SDS(0.25%),water,hydrochloric acid solution(pH=1.2),acetate buffer(pH=4.5),phosphate buffer(pH=6.8)were used as the dissolution media to test the dissolution rate and draw the dissolution curves.Results The dissolution rate of nimodipine oral solid preparation was not related to the bioavailability in 0.25% SDS,but related to other media.Conclusion SDS hides the intrinsic quality of nimodipine oral solid pr...