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Updated: Feb 11, 2026

Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry UPLC-HRMS
Published on: May 20, 2013
A validated UPLC-MS/MS method for flibanserin in plasma and its pharmacokinetic interaction with bosentan in rats
Muzaffar Iqbal1,2, Essam Ezzeldin1,2, Naser L Rezk3
1Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box No 2457 Riyadh, Saudi Arabia.
Aim:
The purpose of this study was development, validation and application of ultra-performance liquid chromatography (UPLC)-ESI-MS/MS method for quantitation of flibanserin in plasma samples.
Method & Results:
After extraction of analyte from plasma by diethyl ether, separation was performed on UPLC C18 column using mobile phase composition of 10 mM ammonium formate-acetonitrile (30:70, v/v) by isocratic elution of 0.3 ml/min. The multiple reaction monitoring transitions of m/z 391.13 → 161.04 and 384.20 → 253.06 were used for detection of analyte and internal standard (quetiapine), respectively. The calibration curves were linear (r ≥ 0.995) between 0.22 and 555 ng/ml concentration and all validation results were within the acceptable range as per US FDA guidelines.
Conclusion:
The assay procedure was fully validated and successfully applied in pharmacokinetic interaction study of flibanserin with bosentan in rats.
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