Abstract
Introduction: The Shengxian decoction (SXT), a Chinese herbal medication used to treat heart failure, is composed of Astragali Radix, Anemarrhenae Rhizoma, Bupleuri Radix, Cimicifuage Rhizoma, and Platycodonis Radix. Knowledge of the excretion of the active compounds in this herbal medication is vital for investigating the underlying mechanisms behind its compatibility. However, this remains unclear. Methods: Liquid chromatography coupled with mass spectrometry was performed in both positive and negative modes to assay 18 constituents of SXT from rat urinary, fecal, and biliary samples. Results: The methodology was validated and showed good linearity (r ≥ 0.9), precision, stability, repeatability, and recovery. The relative standard deviations and relative errors for the precision and accuracy did not exceed 15%. The recoveries of all the compounds ranged from 77.37% to 114.82%, and the matrix effect was between 82.53% and 105.71%. The results suggested that, when combined with Platycodonis Radix, the levels of 14 constituents from the four herbs were reduced in the urine, while the levels of six constituents were reduced in the feces. Conclusions: The comparative excretion results indicated that Platycodonis Radix reduced the excretion of compounds in SXT, demonstrating the compatibility mechanism and holistic properties of these compounds, favoring the pharmacological effects of SXT.
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