Abstract
Piperine (PIP) is used as anticonvulsant in traditional Chinese medicine. Co-administration of low-dose sodium valproate with PIP has been regarded to have potential anticonvulsant activity.Aim:This study was intended to investigate the effect of PIP on the pharmacokinetics of sodium valproate (SVP) in the plasma samples of rats using gas chromatography-mass spectrometry (GC-MS) method.Materials and Methods:The plasma samples obtained after oral administration of SVP, 150 mg/kg and SVP, 150 mg/kg + PIP, and 5 mg/kg to male Wistar rats were used to quantify the concentrations in plasma using GC-MS method.Results:A simple and accurate method developed in-house was applied for the analysis of plasma samples of Wistar rats after oral administration of SVP and PIP + sodium valproate, respectively. The pharmacokinetic parameters reported 14.8-fold increase in plasma concentration (maximum observed concentration in the concentration-time profile), 4.6-fold increase in area under the curve and slightly prolonged time to reach that concentration (1 h) of SVP in presence of PIP.Conclusion:The study reaffirms the bioenhancing effect of PIP suggesting possibility of dose reduction of SVP while co-adminstering with PIP.
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