Analytical and bioanalytical HPLC method for simultaneous estimation of 5-fluorouracil and sonidegib

To develop a new sensitive RP-HPLC method for simultaneous estimation of 5-fluorouracil (5-FU) and sonidegib (SDG). Analytical and bioanalytical methods for simultaneous quantification of 5-FU and SDG in bulk, nanoformulations and in rat plasma were developed and validated using a gradient elution technique. Separation of the analytes was effected on a Luna C18 LC column using a mobile mixture comprising acetonitrile and acidified water. 5-FU and SDG were extracted from plasma matrix using liquid–liquid extraction. The applicability of the method was verified through single-dose oral pharmacokinetic study in Wistar rats. The developed methods allow a specific, sensitive and steady analytical procedure for the simultaneous estimation of 5-FU and SDG in nanoformulations and biological matrix.