Formulation and evaluation studies of Atorvastatin calcium sustained release tablet
Atorvastatin calcium is a poorly water soluble compound marketed in Bangladesh under bio-waiver conditions. The present study aimed to develop formulation and drug excipients compatibility study of Atorvastatin calcium (50 mg) sustain release tablet and optimize the final formula. The tablet were formulated by direct compression method and the results obtained were extrapolated. Solid dispersion of Atorvastatin calcium was prepared by using Hydroxypropyl methyl cellulose, Methyl cellulose, Lactose, Guar gum, Xanthan gum & Magnesium Stearate. The in vitro equivalence test was carried out in three different media. Test results were subjected to statistical analysis to compare the dissolution profiles. Other general quality parameters of these tablets such as weight variation, friability, thickness, hardness and disintegration time were also determined according to established protocols. Final formulation of solid dispersed Atorvastatin calcium revealed that successfully improvement of solubility as well as dissolution of Atorvastatin calcium in long time. This study could be very much helpful for better bioavailability of poorly water soluble drug avoiding first pass metabolism. Finally, we can claim that prepared tablets are proved to be promising dosage form for sustained drug delivery of Atorvastatin calcium by reducing dosing frequency and increasing the patient compliance.