Abstract: (Object) An oral sustained-release tablet is provided, which does not cause initial rapid increases in the bloodlevels of 4-(2-methyl-1-imidazolyl)-2,2-diphenylbutylamide (KRP-197) and can maintain constant the blood levels. (Solving means) An oral sustained-release tablet comprises a pharmaceutical composition and a gel-forming material, the pharmaceutical composition containing KRP-197 as an active ingredient.

Abstract: Herein provided is a method for easily preparing a sustained release tablet which contains an orally administrable medicinal component, while maintaining the uniformity of the content of the medicinal component. The method comprises mixing (1) a granulated product A obtained by granulating an excipient and an enteric coating agent while spraying thereon with a solution or a suspension containing an orally administrable medicinal component, with (2) a composition B containing a hydrogel-forming substance; and then compressing the resulting mixture into a tablet.

Abstract: (Object) An oral sustained-release tablet is provided, which does not cause initial rapid increases in the bloodlevels of 4-(2-methyl-1-imidazolyl)-2,2-diphenylbutylamide (KRP-197) and can maintain constant the blood levels. (Solving means) An oral sustained-release tablet comprises a pharmaceutical composition and a gel-forming material, the pharmaceutical composition containing KRP-197 as an active ingredient.

Abstract: Herein provided is a method for easily preparing a sustained release tablet which contains an orally administrable medicinal component, while maintaining the uniformity of the content of the medicinal component. The method comprises mixing (1) a granulated product A obtained by granulating an excipient and an enteric coating agent while spraying thereon with a solution or a suspension containing an orally administrable medicinal component, with (2) a composition B containing a hydrogel-forming substance; and then compressing the resulting mixture into a tablet.

Abstract: A multiple-unit oral sustained release preparation is provided which allows controlled release of imidafenacin [4-(2-methyl-1-imidazolyl)-2,2-diphenylbutylamide]. The preparation serves to ensure a prolonged effect of imidafenacin and prevent rapid elevation in the blood levels of imidafenacin. Specifically, granules or powders comprising imidafenacin dispersed in a water-insoluble polymer or a higher alcohol are used in the preparation. These preparations achieve sustained release of imidafenacin since the molecular network structure that the water-insoluble polymer or the higher alcohol forms during the preparation of the granules or powders serves to control the rate of diffusion of imidafenacin in water. Granules comprising a core granule having two layers of an inner imidafenacin coating and an outer water-insoluble polymer coating are used in the preparation. The water-insoluble polymer coating serves to control the rate of diffusion of imidafenacin in water and ensure sustained release of imidafenacin.

Abstract: Upon performing the clinical study of (S)-2-[3-[N-[4-(4-fluorophenoxy)benzyl]carbamoyl]-4-methoxybenz yl]butanoic acid (hereinafter abbreviated as KRP-101), of which improvement in the lipidmetabolism is expected in a microdose, no oral solid dosage form that allows KRP-101 to be administered quantitatively has been embodied. After mixing KRP-101 with additives (excipient, disintegrator and lubricant), the mixture is granulated, pressed into tablets and coated with coating agent, thereby film-coated tablets uniformly containing a small amount of KRP-101 are obtained, making it possible to administer amicrodose of KRP-101 quantitatively on clinical study.

Abstract: An oral sustained-release tablet is provided, which does not cause initial rapid increases in the bloodlevels of 4-(2-methyl-1-imidazolyl)-2,2-diphenylbutylamide (KRP-197) and can maintain constant the blood levels. (Solving means) An oral sustained-release tablet comprises a pharmaceutical composition and a gel-forming material, the pharmaceutical composition containing KRP-197 as an active ingredient.

Abstract: (Object) A transdermal preparation is provided, which ensures stable and effective absorption of 4-(2-methyl-1-imidazolyl)-2,2-diphenylbutylamide (KRP-197) which has a low skin absorption and is a bladder-selective muscarinic M3 and M1 receptor antagonist, into body through the skin while causing little side effects and providing sustained pharmacological effect with less skin irritancy. (Solving means) A composition comprising KRP-197 and an external preparation base is deposited and dried onto a structural body or a small pool of the composition is deposited on the structural body to obtain a single adhesive layer-type transdermal preparation or a reservoir-type transdermal preparation. These preparations can ensure high permeation of KRP-197 through the skin and sustained absorption of KRP-197 into body while causing decreased skin irritancy.