SIMULTANEOUS RP-HPLC METHOD FOR DETERMINATION OF BETAMETHASONE DIPROPIONATE AND TOLNAFTATE IN COMBINED SEMISOLID FORMULATION

A new RP-HPLC method was developed for selective and simultaneous determination of betamethasone dipropionate and tolnaftate in combined semisolid formulation containing other components. Further, the proposed method was validated for linearity, precision (system precision, method precision, intermediate or inter-day precision), accuracy, stability in analytical solution, robustness or system suitability and ruggedness. The developed method exhibited the best results in terms of the aforesaid validation parameters. The other components and additives did not interfere in their determinations. The method was found to be selective, simple, economical, accurate, reproducible, rapid and reliable for routine estimation purpose of these drugs in combined semisolid formulations.

Key-words: Betamethasone dipropionate, tolnaftate, RP-HPLC, semisolid formulation.