SIMULTANEOUS QUANTIFICATION OF MINOXIDIL AND FINASTERIDE IN BULK AND PHARMACEUTICAL DOSAGE FORM BY RP-HPLC METHOD

A strategic specific and sensitive quantitative analysis of Minoxidil and Finasteride has been developed by using HPLC with reliable, precise, and accurate result in bulk and marketed formulation. In this method Phenomenex C 18 (250 mm × 4.6 mm, 5 μm) column was used as stationary phase and a composition of Methanol: Water (85:15 v/v) was used as mobile phase. An isocratic elution programming has been done at a flow rate of 1 mL min -1 . The eluted analytes show appreciable absorbance at 223 nm. The proposed RP-LC method was validated according to ICH guidelines. The retention time of Minoxidil and Finasteride was found to be 3.15 min and 4.36 min respectively. The method was found to be linear over a range of 6 – 54 µg mL -1 for Minoxidil and 0.2-1.8 µg mL -1 for Finasteride. The percentage recovery was found to be 99.88-100.85 % for Minoxidil and 99.99-100.33 % for Finasteride. The proposed reverse phase LC method has potential qualitative as well as quantitative applications for simultaneous estimation of Minoxidil and Finasteride in bulk and pharmaceutical dosage form.