21DEVELOPMENT AND VALIDATION OF SIMULTANEOUS ESTIMATION OF PARACETAMOL, ACECLOFENAC AND RABEPRAZOLE IN COMBINED TABLET DOSAGE FORMULATION BY HPTLC METHODA simple, sensitive, reliable and rapid HPTLC method has been developed for the determination of paracetamol, aceclofenac and rabeprazole in combined tablet dosage form. Determination was performed on aluminium backed silica gel 60F254 washed with methanol. The mobile phase used is ethyl acetate- methanol- glacial acetic acid (9: 1: 0.1). The spots were scanned at 275nm. The linearity of paracetamol, aceclofenac and rabeprazole was found to be 100-500µg/ml, 20-100µg/ml, 2- 10µg/ml respectively. The method was validated for accuracy, precision, repeatability. The method was used for the determination of the compound in commercial pharmaceutical dosage forms.mallimpharmmba@gmail.comResearch122010HPTLC,Pharmaceutical dosage form,Paracetamol,Aceclofenac and Rabeprazole, Method Development and ValidationMallikarjuna rao N,Bagyalakshmi J, Ravi T.K Sri Ramakrishna institute of Para medical sciences, Department of Pharmaceutical Analysis, College of Pharmacy, Coimbatore, Tamilnadu, India., Sri Ramakrishna institute of Para medical sciences, Department of Pharmaceutical Analysis, College of Pharmacy, Coimbatore, Tamilnadu, India., Sri Ramakrishna institute of Para medical sciences, Department of Pharmaceutical Analysis, College of Pharmacy, Coimbatore, Tamilnadu, India.