An implantable medical device (1200) for the controlled administration of drugs, comprising: a first portion of drug (1204) comprising a first housing of drug loaded with a first drug formulation comprising a first drug in solid or semisolid form, wherein the first housing medicament comprises a first wall that is permeable to water but is substantially impermeable to the first drug and having at least one passage (1210) through the first wall, releasing the first part of medication the first drug in vivo according to a first release profile and a second portion of the drug (1202) comprising a second housing of drug loaded with a second pharmaceutical formulation comprising a second drug as solid or semisolid, wherein the second housing medicament comprises a second wall which is permeable to water and the second drug, releasing the second part of the second drug drug in vivo according to a second release profile, differentiating the second release profile of the first profile of release and a retaining portion operatively associated with both the first part and the second part of the drug (1202, 1204), wherein the first and second housings of medicament are divided a single tubular body regions, comprising the first and second walls a selected silicone and medicinal qualities of poly (vinyl chloride), polyolefins and polyether urethanes polymer, wherein the first drug having a charge and / or molecular size that make the first wall is impermeable to the first medication, and where the second drug has a loading and / or molecular size make the second wall is permeable to the second drug.Un dispositivo medico implantable (1200) para la administracion controlada de medicamentos, que comprende: una primera parte de medicamento (1204) que comprende un primer alojamiento de medicamento cargado con una primera formulacion de medicamento que comprende un primer medicamento en forma solida o semisolida, en donde el primer alojamiento de medicamento comprende una primera par
