title: Development of novel spray coated soft elastic gelatin capsule sustained release formulations of nifedipine.
abstract: Nifedipine release from coated commercially available immediate release soft elastic gelatin capsules was investigated. Capsules were spray coated using two different polymeric combinations, ethylcellulose and hydroxypropylmethylcellulose or pectin, at different coating loads. In vitro drug release studies were conducted in three different dissolution media: with gastric pretreatment, without gastric pretreatment, and in water to investigate the pH effect on nifedipine release. Convolution of in vitro dissolution data for selected formulations and commercially available sustained release nifedipine formulations showed that the tested formulations provided release profiles of nifedipine that are very promising in terms of desirable sustained release formulations.
authors.affiliation: Faculty of Pharmacy, Department of Pharmaceutics, Helwan University, Ain Helwan, Helwan, Cairo, Egypt. sahar33a@hotmail.com
authors.forename: Sahar
authors.initials: S
authors.lastname: Abd El-Sattar Fahmy
authors.forename: J Mark
authors.initials: JM
authors.lastname: Christensen
authors.forename: James W
authors.initials: JW
authors.lastname: Ayres
mesh_terms: D002121:Calcium Channel Blockers / Q000008:administration & dosage* / Q000737:chemistry; D002214:Capsules; D002482:Cellulose / Q000031:analogs & derivatives / Q000737:chemistry; D003692:Delayed-Action Preparations; D005079:Excipients / Q000737:chemistry*; D005780:Gelatin; D006863:Hydrogen-Ion Concentration; D065347:Hypromellose Derivatives; D008747:Methylcellulose / Q000031:analogs & derivatives / Q000737:chemistry; D009543:Nifedipine / Q000008:administration & dosage* / Q000737:chemistry; D010368:Pectins / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D012995:Solubility
chemical_list: D002121:Calcium Channel Blockers; D002214:Capsules; D003692:Delayed-Action Preparations; D005079:Excipients; D011108:Polymers; D065347:Hypromellose Derivatives; C013517:ethyl cellulose; D010368:Pectins; D005780:Gelatin; D002482:Cellulose; D008747:Methylcellulose; D009543:Nifedipine