[Problem] To provide pharmaceutical preparations where the dissolution of an amine drug can be effectively controlled. [Resolution Means] Slow-release granules formed by providing a coating layer containing polyvinyl acetate and surfactant on drug-containing particles comprising an amine drug and a water-soluble binder coated onto the surface of a core material; together with a method for the production of slow-release granules which includes (i) a stage in which a liquid comprising an amine drug and a water-soluble binder dissolved or dispersed in an aqueous solvent is sprayed onto the surface of a core material and dried to form a drug layer, and (ii) a stage in which an aqueous coating liquid containing polyvinyl acetate and surfactant is sprayed onto the drug-containing particles obtained in stage (i) and dried to form a coating layer.