Microspheres of dipyridamole were prepared by solvent evaporation meth
ods. The effect of additives Avicel PH 101, and beta cyclodextrin on t
he release rate of tableted microspheres were studied. Incorporating A
vicel or beta cyclodextrin increased the dipyridamole release rates in
tableted microspheres. Beta cyclodextrin was found to be a good addit
ive for microsphere tablets to increase the drug release rates without
causing disintegration.