Coated senna extract granules are described, which comprise senna extract with 20% sennosides, Eudragit® L-100 and Eudragit® L30 D-55. The granulation process comprises processing the senna extract with Eudragit® L-100 solution in isopropyl alcohol, this solution being prepared twice, in equal quantities each time, and each solution is divided into 2 equal parts. The senna extract granulate is obtained by mixing the extract with one of said solutions, kneading and drying the granules. The resulting dry granules are mixed, again, with another of the Eudragit® L-100 solutions, kneaded and dried. This operation is repeated until all the solutions are used up. The resulting final granules are coated with a solution of Eudragit® L30 D-55 and polyethylene glycol and a solution of talc in purified water. Furthermore, the preparation of a jelly formulation that comprises the coated granules is described.
