The present work focused on developing and validating simple, precise, accurate, sensitive, and stability-indicating chromatographic methods for the simultaneous estimation of Tolperisone Hydrochloride and Diclofenac Sodium in combined pharmaceutical dosage forms. Although RP-HPLC and HPTLC methods had been reported for their assay, no stability-indicating methods were available in literature. Hence, methods were developed as per ICH guidelines to ensure reliability in quality control. The optimized RP-HPLC method employed a Kromasil C18 column with methanol, acetonitrile, and water (80:16:4,...