Abstract:Objective: To identify the volatile components in rat urine after oral administration of "Wu-Hu-Tang"(WHT). Method: GC-MS technique was applied to analyzing urine samples. Result: Eighteen components were detected in the WHT-treated rat urine other than the corresponding control. Among them, 14 components were identified, and 7 were also found in the extract of WHT. Conclusion: The above detected components might be derived from WHT, and some of them are effective components of WHT.