| 摘要 |
PROBLEM TO BE SOLVED: To obtain a medicine useful for preventing and/or treating sudden deafness. SOLUTION: This medicine for preventing and/or treating the sudden deafness contains a pyrazolone derivative expressed by formula (I) [wherein, R<SP>1</SP>is H, an aryl, an alkyl or an alkoxycarbonyalkyl; R<SP>2</SP>is H, an aryloxy, an arylmercapto, an alkyl or a hydroxyalkyl; or R<SP>1</SP>and R<SB>2</SB>together form an alkylene; R<SP>3</SP>is a phenyl substituted with 1-3 substituents selected from the group consiting of H, an alkyl, a cycloalkyl, a hydroxyalkyl, benzyl, naphthyl, phenyl, or a substituted phenyl with 1-3 substituents selected from the group consisting of an alkyl, an alkoxy, a hydroxyalkyl, an alkoxycarbonyl, an alkylmercapto, an alkylamino, a dialkylamino, a halogen atom, trifluoromethyl, carboxy, cyano, hydoxy, nitro, amino and acetamido] as an active ingredient. COPYRIGHT: (C)2004,JPO
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