DOI: 10.21276/ajptr
Wed, 27 Mar 2019

Validated RP- HPLC Method for Simultaneous Estimation of Metaxalone and Diclofenac potassium in Combined Dosage Form

K. Vinod kumar*1, M.sudhakar1, Y Padmanabha Reddy2, A. Ravindra2

1. Division of Pharmaceutical Analysis, Malla Reddy College of Pharmacy. Maisammaguda, Secunderabad, Andhra Pradesh, India – 500 072

2. Division of Pharmaceutical Analysis and Quality Assurance, Center for Pharmaceutical Research (CPR), Raghavendra Institute of Pharmaceutical Education and Research (RIPER) Anantapur, Andhra Pradesh, India – 515 721


A simple, accurate, precise, specific, sensitive, reproducible and Reliable RP- HPLC Method was developed for Quantitative Estimation of Metaxalone and Diclofenac potassium in Pharmaceutical Dosage Form. The developed RP- HPLC method with the mobile phase Methanol: Water (80: 20) and Qualisilgold-C18 (250Χ4.6mm, 5μm particle size) as stationary phase with a flow rate of 1.0 mL/minute by using λmax 275nm and PDA detector. Proposed method was found to be linear in the concentration range of 8.0 to 80.0 μg/mL for Metaxalone and 1.0 to 10.0 μg/mL for Diclofenac potassium respectively, and the correlation coefficient was found to be 0.9991 for both the drugs. Precision study showed that the % RSD was within the range of acceptable limits (< 2), and the % Recovery was found to be in the range of 99.29%-101.28% for Metaxalone and 99.98%-102.45% for Diclofenac potassium. The proposed method has been validated as per ICH guidelines.

Keywords: RP- HPLC, Metaxalone, Diclofenac potassium, PDA, ICH, Method validation.

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