title: Development of novel diclofenac potassium controlled release tablets by wet granulation technique and the effect of co-excipients on in vitro drug release rates.
abstract: The aim of the present study was the formulation and evaluation of controlled release polymeric tablets of Diclofenac Potassium by wet granulation method for the release rate, release pattern and the mechanism involved in drug release. Formulations having three grades of polymer Ethocel (7P; 7FP, 10P, 10FP, 100P, 100FP) in several drugs to polymer ratios (10:3 and 10:1) were compressed into tablets using wet granulation method. Co-excipients were added to some selected formulations to investigate their enhancement effect on in vitro drug release patterns. In vitro drug release studies were performed using USP Method-1 (Rotating Basket method) and Phosphate buffer (pH 7.4) was used as a dissolution medium. The similarities and dissimilarities of release profiles of test formulations with reference standard were checked using f2 similarity factor and f1 dissimilarity factor. Mathematical/Kinetic models were employed to determine the release mechanism and drug release kinetics.
authors.affiliation: Department of Pharmaceutics, Faculty of Pharmacy, Gomal University Dera Ismail Khan, Pakistan.
authors.forename: Shefaatullah
authors.initials: S
authors.lastname: Shah
authors.forename: Gul Majid
authors.initials: GM
authors.lastname: Khan
authors.forename: Syed Umer
authors.initials: SU
authors.lastname: Jan
authors.forename: Kifayatullah
authors.initials: K
authors.lastname: Shah
authors.forename: Abid
authors.initials: A
authors.lastname: Hussain
authors.forename: Haroon
authors.initials: H
authors.lastname: Khan
authors.forename: Haroon
authors.initials: H
authors.lastname: Khan
authors.forename: Haroon
authors.initials: H
authors.lastname: Khan
authors.forename: Kamran Ahmad
authors.initials: KA
authors.lastname: Khan
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives / Q000737:chemistry; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D003692:Delayed-Action Preparations / Q000737:chemistry*; D004008:Diclofenac / Q000008:administration & dosage / Q000737:chemistry*; D004339:Drug Compounding / Q000379:methods* / Q000706:statistics & numerical data; D005079:Excipients / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D007700:Kinetics; D012995:Solubility; D013607:Tablets / Q000737:chemistry*
chemical_list: D003692:Delayed-Action Preparations; D005079:Excipients; D013607:Tablets; D004008:Diclofenac; C013517:ethyl cellulose; D002482:Cellulose