無症候性脳梗塞患者に対する桂枝茯苓丸の効果を検討した。142例(男性32例,女性110例,平均年齢68.9才)を対象とし,副作用のため内服を中止した3例を除く139例に対して,桂枝茯苓丸エキス1日量7.5gを12週間投与した。投与開始時と比較して,改訂長谷川式簡易知能評価スケール,Apathyスケール(やる気スケール),SDS(うつ状態スケール)は有意に改善した。また,頭重感,頭痛,めまいの自覚症状も桂枝茯苓丸の投与により改善し,拡張期血圧は投与前に比べ有意に低下した。これらの結果から,桂枝茯苓丸が無症候性脳梗塞に伴う認知機能の低下,精神症状や自覚症状の悪化に対して有効である可能性が示唆された。 The efficacy of Keishi-bukuryo-gan in patients suffering from asymptomatic cerebral infarction was studied. 142 patients, 32 males and 110 females, with a mean age of 68.9 years, were enrolled and analyzed, and 139 completed the study. They were given Keishi-bukuryo-gan extract (7.5g/day) three times a day for 12 weeks. In comparison to the beginning of the study, Keishi-bukuryo-gan showed improvement with statistical significance in the mean revised version of Hasegawa\u27s dementia scale, Apathy scale and Self-rating depression scale. The number of patients with subjective symptoms as headdullness, headache and dizziness decreased by the treatment with Keishi-bukuryo-gan, and diastolic blood pressure was decreased with statistical significance as compared to the beginning of the study. These results suggest that Keishi-bukuryo-gan is effective against dysfunction of acknowledgment, emotional disorder and subjective symptoms with asymptomatic cerebral infarction