The present invention provides oil marbles for pharmaceutical compositions, comprising:- a core containing an active ingredient which is dissolved, suspended or dispersed in a pharmaceutically acceptable solvent, said core further comprising at least one component selected from the group comprising a pharmaceutically acceptable polymer, a pharmaceutically acceptable wax, a pharmaceutically acceptable solid polymer matrix； and- a shell containing or comprised of solid particles, said solid particles comprising at least one pharmaceutically acceptable filler or binder.These solid-core oil marbles are suitable for preparation of pharmaceutical formulations, in particular for poorly soluble active ingredients, and namely for decreasing the size of the pharmaceutical form and influencing the release rate of the active ingredient.
