Drug with programmed release containing acetylsalicylic acid.

摘要

1. Claim (for the Contracting States : BE, CH, DE, FR, GB, IT, LI, LU) Pharmaceutical composition based on acetylsalicylic acid comprising support granules of a non-toxic substance, having a diameter of approximately 500 to 600 mu m, covered with several layers (a) of a coating, consisting of a mixture containing acetylsalicylic acid, polyvidone as excipient and ethyl phthalate, protected by (b) a covering of anionic polymer of methacrylic acid, (a) and (b) being separated by layers of talc, the polyvidone excipient and the ethyl phthalate representing 4 to 8% of the total weight of the preparation whilst the support granules and the covering represent 20 to 30% of the total weight of the preparation, the number of layers of the coating (a) and of the covering (b) being such that 4% of the weight of the acetylsalicylic acid are discharged in an artificial duodenal medium within 1 hour and 100% thereof within 4 hours. 1. Claims (for the Contracting State AT) Process for the preparation of a pharmaceutical composition based on acetylsalicylic acid, comprising support granules of a non-toxic substance, having a diameter of approximately 500 to 600 mu m, covered with several layers (a) of a coating consisting of a mixture containing acetylsalicylic acid, polyvidone as excipient and ethyl phthalate, protected by (b) a covering of anionic polymer of methacrylic acid, (a) and (b) being separated by layers of talc, the polyvidone excipient and ethyl phthalate representing 4 to 8% of the total weight of the preparation, whilst the support granules and the covering represent 20 to 30% of the total weight of the preparation, the number of layers of the coating (a) and of the cover (b) being such that 4% of the weight of the acetylsalicylic acid are discharged in an artificial duodenal medium within 1 hour and 100% thereof in 4 hours, characterised in that the granulated support is prepared, that after drying and calibration it is coated with a hydroalcoholic solution of polyvidone excipient and ethyl phthalate containing acetylsalicylic acid, that it is dried and calibrated, that the granule thus coated is covered with an alcoholic solution of anionic polymer of methacrylic acid and that it is powdered with talc, the covering process being repeated until the discharge programme is completed.