title: Zero-order release of aspirin, theophylline and atenolol in water from novel methylcellulose glutarate matrix tablets.
abstract: A novel hydrocolloidal polymer, methylcellulose glutarate (MC-GA), was prepared by esterifying methylcellulose with glutaric anhydride. The formation of ester was confirmed by FTIR and NMR spectroscopy, DSC and elemental analysis. The physicochemical properties such as, rate of swelling in water, viscosity and hygroscopicity of MC-GA were determined and compared with those of methycellulose A (MC). Aspirin, theophylline and atenolol tablets were compacted on a Carver press using the wet granulation method. Each tablet contained: 200 mg active, 80 mg anhydrous lactose, 8 mg povidone, 4 mg magnesium stearate, 4 mg talc, 50mg MC or MC-GA (drug-to-polymer ratio, 4:1). Contrary to the first-order release profile of all the drugs from the MC matrix tablets, a zero-order release was obtained from the MC-GA matrix tablets in water.
authors.affiliation: Division of Pharmaceutical Sciences, Arnold & Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, University Plaza, Brooklyn, NY 11201, USA.
authors.forename: A
authors.initials: A
authors.lastname: Khairuzzaman
authors.forename: S U
authors.initials: SU
authors.lastname: Ahmed
authors.forename: M
authors.initials: M
authors.lastname: Savva
authors.forename: N K
authors.initials: NK
authors.lastname: Patel
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000008:administration & dosage* / Q000737:chemistry; D000327:Adsorption; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage* / Q000737:chemistry; D001241:Aspirin / Q000008:administration & dosage* / Q000737:chemistry; D001262:Atenolol / Q000008:administration & dosage* / Q000737:chemistry; D001993:Bronchodilator Agents / Q000008:administration & dosage* / Q000737:chemistry; D002152:Calorimetry, Differential Scanning; D002626:Chemistry, Pharmaceutical; D005079:Excipients / Q000737:chemistry*; D005977:Glutarates / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008747:Methylcellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013607:Tablets; D013806:Theophylline / Q000008:administration & dosage* / Q000737:chemistry; D014783:Viscosity
chemical_list: D000319:Adrenergic beta-Antagonists; D000894:Anti-Inflammatory Agents, Non-Steroidal; D001993:Bronchodilator Agents; D005079:Excipients; D005977:Glutarates; D013607:Tablets; C516574:methylcellulose glutarate polymer; D001262:Atenolol; D008747:Methylcellulose; D013806:Theophylline; D001241:Aspirin