Xerostomia is a frequently observed clinical symptom.Chinese medicine treatment has obvious advantages in dealing with it.However,currently the treatment of xerostomia refers more to consumptive thirst and dryness syndrome;lung-stomach fluid consumption and excessive heat evil are believed to be its pathogenesis.Heat-clearing and fire-purging medications that nourishes yin to moisten dryness,such as Qingwei Powder,Baihu Decoction,Radix Ophiopogon Decoction,and Qingzao Jiufei Decoction,are mostly used for treatment.It works in the majority of patients but not in a minority.This requires us to broaden our minds,re-explore the pathogenesis of xerostomia and identify new treatment and prescriptions to improve efficacy.The author has observed that many patients with xerostomia in the clinical practice feel thirsty but do not want to drink more water or drink a little water,which is the major characteristic of the symptom.Therefore,the author believes spleen deficiency,failure to ascend lucidity,and failure to transport the moisture to mouth are the important pathogenesis,requiring spleen-invigorating,qi-supplementing,and lucidity-ascending treatment.Buzhong Yiqi Decoction may provide a good efficacy.%口干是临床出现频率很高的症状,中医治疗有明显优势.但目前口干的治疗多参照消渴和燥证,认为肺胃津伤、热邪鹗张是其病机,多使用清热泻火、养阴润燥的清胃散、白虎汤、沙参麦冬汤、清燥救肺汤等治疗,大部分患者奏效,少部分患者罔效,只有拓宽思路、重新探究口干的病机并确定新的治法和方药,才能提高疗效.笔者在临床观察到很多口干以渴不思饮、渴而饮少为主要特征,故认为脾气亏虚、不能升清、津不上承是其重要病机,治疗时需健脾益气升清,使用补中益气汤治疗可收到好的疗效.
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