Results:Apoplectic prodrome is related to many high risk factors,especially weak constitution in the old,constitutional yin deficiency and yang excess,irritability,overwork,and partiality to sweet and greasy food,tobacco and alcohol;the clinical manifestations are mostly fire,heat,phlegm and blood stasis syn.

Objective:To approach the mechanism of clinical effect of Naoningkang on preveting and treating threatened apoplexy.

To describe the distinction and the correlation between transient ischemic attack and diseases in TCM Including Stroke Precursor,Slight stroke,etc.

Comparative study on clinical therapeutic effects of Xiangdan injection(香丹注射液) in treating stroke portent syndrome;