Abstract: Provided is a process for the production of nano- and/or microparticles containing a therapeutically active agent embedded in a polymer matrix or encapsulated by a polymer shell, and nano- and/or microparticles obtainable by the process, said process comprising the steps of: a) providing a solution of a polymer selected from polylactide, polyglycolide, and polyester copolymers comprising copolymerized units of lactic acid and/or glycolic acid in an organic solvent S1 having limited water solubility; b) providing a solution or dispersion of a therapeutically active agent in as solvent or mixture of organic solvents S2 comprising at least 50 vol.

Abstract: Provided is a process for the production of nano- and/or microparticles containing a therapeutically active agent embedded in a polymer matrix or encapsulated by a polymer shell, and nano- and/or microparticles obtainable by the process, said process comprising the steps of: a) providing a solution of a polymer selected from polylactide, polyglycolide, and polyester copolymers comprising copolymerized units of lactic acid and/or glycolic acid in an organic solvent SI having limited water solubility: b) providing a solution or dispersion of a therapeutically active agent in as solvent or mixture of organic solvents S2 comprising at least 50 vol.

Abstract: The invention relates to nano- or microparticles containing an active substance embedded in a polymer matrix and to a method for their production, comprising the steps of: a) effecting precipitation of an active substance in a solution which comprises a polymer dissolved in an organic solvent to obtain a suspension of the active substance, b) mixing the obtained suspension with an aqueous surfactant solution and solidifying the polymer to obtain a suspension of nano- or microparticles which contain an active substance.

Abstract: Microparticles and a method for their production is described. The process of the present invention provides a simple, quick, and efficient one-pot process for the production of microparticles containing a hydrophilic active agent of various and uniform morphologies, including microcapsules, microspheres, and microsponges. The microparticles are preferably used for pharmaceutical applications.