Abstract: An object of the present invention is to provide a controlled-release preparation containing 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}-N-(methylsulfonyl)acetamide as an active ingredient and having an excellent release property. Another object of the present invention is to provide a controlled-release preparation characterized by containing 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}-N-(methylsulfonyl)acetamide, a water-soluble polymer, a functional starch, and an alkaline substance, and having a pH of 10 or more.

Abstract: An object of the present invention is to provide a controlled-release preparation containing 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}-N-(methylsulfonyl)acetamide as an active ingredient and having an excellent release property. A controlled-release preparation characterized by containing 2-{4-[N-(5,6-diphenylpyrazin-2-yl)-N-isopropylamino]butyloxy}-N-(methylsulfonyl)acetamide, a water-soluble polymer, a functional starch, and an alkaline substance, and having a pH of 10 or more.

Abstract: An object of the present invention is to provide a compression-molded preparation which has an excellent disintegration property and can be easily produced despite the use of granules coated with a polymer coating film having a function such as masking of an unpleasant taste. A compression-molded preparation achieving the above object is characterized by including granules obtained by coating a polymer-coated, granulated substance, in which a granulated substance containing a drug is coated with a polymer coating film, with one kind or two or more kinds of additives selected from the group consisting of a metal stearate, stearic acid, a sucrose fatty acid ester, talc, and silicic acid.