失眠是临床常见症状之一。有报道说，失眠随着年龄增加而增加，60岁以上高龄者半数以上失眠[1]。据日本北里大学等医院抽查1万张门诊处方看，安眠药处方占10％，占精神神经科的51％[4]。据魏氏调查门诊处方300413张，BZ类处方5397张，占精神药品处方的8393％，以内科老年患者为 Insomnia is one of the common clinical symptoms. It is reported that insomnia increases with age, more than half of elderly people over the age of 60 insomnia [1]. According to Japan’s Beili University and other hospitals random inspection of 10,000 outpatient prescriptions, sleeping pills prescription accounted for 10%, accounting for 51% of neurological neurology [4]. According to Wei’s survey of outpatient prescriptions 300413 sheets, 5397 BZ prescriptions, accounting for 8393% of prescriptions for psychotropic drugs, the elderly patients with internal medicine as