PROBLEM TO BE SOLVED: To provide a ramelteon-containing coating preparation capable of maintaining stable physical properties of ramelteon during production and long-term storage. SOLUTION: A ramelteon-containing coating preparation in which a nucleus containing ramelteon is coated with a coating agent containing polyvinyl alcohol, acrylic acid, and methyl methacrylate copolymer. The coating agent preferably contains the polyvinyl alcohol / acrylic acid / methyl methacrylate copolymer in an amount of 50% by mass or more of the coating agent. [Selection diagram] None
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