References
- Vueba M, Batista de Carvalho L, Veiga F, Sousa J, Pina M. (2005). Role of cellulose ether polymers on ibuprofen release from matrix tablets. Drug Dev Ind Pharm, 31:653–5.
- Shehab M, Richards J. (1996). Studies on the in vitro release of ibuprofen from polyethylene glycol-polyvinyl acetate mixtures liquid filled into hard gelatin capsules. Drug Dev Ind Pharm, 22:645–51.
- Efentakis M, Vlachou M. (2000). Evaluation of high molecular weight poly(oxyethylene) [Polyox] polymer: Studies of flow properties and release rates of furosemide and captopril from controlled release hard gelatin capsules. Pharm Dev Technol, 5:339–46.
- Efentakis M, Koutlis A. (2001). Release of furosemide from multiple-unit and single unit preparations containing different viscosity grades of sodium alginate. Pharm Dev Technol, 6:91–8.
- Conte U, Maggi L. (1998). Multi-layer tablets as drug delivery devices. Pharm Technnol, 10:8–25.
- Qiu Y, Chindambaram N, Flood K. (1998). Design and evaluation of layered diffusional matrices for zero order sustained release. Int J Pharm, 5:123–30.
- Abdul S, Poddar S. (2004). A flexible technology for modified release of drugs: Multi-layered tablets. J Control Release, 97:393–405.
- Song C, Labnasetwar V, Levy R. (1999). Controlled release of U-86983 from double layer biodegradable matrices: Effect of additives on release mechanism and kinetics. J Control Release, 45:177–92.
- Efentakis M, Politis S. (2006). Comparative evaluation of various structures in polymer controlled drug delivery systems and the effect of their morphology and characteristics on drug release. Eur Polym J, 42:1183–95.
- Korsmeyer R. (2000). Diffusion controlled systems. In: Tarca P, ed. Polymers for controlled release drug delivery. Boca Raton, FL: CRC Press Inc, 15–38.
- Zuleger S, Fassihi R, Lippold B. (2002). Polymer particle erosion controlling drug release. II. Swelling investigations to clarify the release mechanism. Int J Pharm, 247:23–37.
- Roy D, Rohera B. (2002). Comparative evaluation of rate of hydration and matrix erosion of HEC and HPC and study of drug release from their matrices. Eur J Pharm Sci, 16:193–9.
- Ebude N, Hikal A, Wyandt M, Beer D, Miller L, Jones A. (1997). Sustained release of acetaminophen from heterogeneous matrix of tablets: Influence of polymer ratio, polymer loading and co-active on drug release. Pharm Dev Technol, 2:161–70.
- Khan K. (1975). The concept of dissolution efficiency. J Pharm Pharmacol, 27:48–50.
- Vlachou M, Naseef H, Efentakis M. (2004). Image analysis of dimensional changes in swellable hydrophilic polymer matrices. Polym Adv Technnol, 15:683–9.
- Papadimitriou E, Buckton G, Efentakis M. (1993). Probing the mechanisms of swelling of hydroxypropylmethylcellulose matrices. Int J Pharm, 98:57–92.
- Conte U, Maggi L. (1996). Modulation of the dissolution profiles from geomatrix multi layer matrix tablets containing drugs of different solubility. Biomaterials, 17:889–96.
- Yang L, Fassihi R. (1997). Modulation of diclofenac release from a totally soluble controlled release drug delivery system. J Control Release, 44:135–40.
- Maggi L, Bruni R, Conte U. (2000). High molecular weight polyethylene oxides (PEOs) as an alternative to HPMC in controlled release dosage forms. Int J Pharm, 195:229–38.
- Kim C. (1998). Effects on drug solubility, drug loading and polymer molecular weight on drug release from Polyox tablets. Drug Dev Ind Pharm, 24:645–51.
- Ojantakanen S, Marvola M, Hannula A, Klinge E, Naukkarinen T. (1993). Bioavailability of ibuprofen from hard gelatin capsules containing different viscosity grades of hydroxypropylmethylcellulose and sodium carboxymethylcellulose. Eur J Pharm Sci, 1:109–14.
- Shah A, Britten N, Badalamenti J. (1989). Gel matrix systems exhibiting biomodal controlled release for oral drug delivery. J Control Release, 9:169–75.
- Conte U, Maggi L. (2000). A flexible technology for the linear, pulsatile and delayed release of drugs, allowing for easy accommodation of difficult in vitro targets. J Control Release, 64:263–8.
- Munday L. (1996). Bimodal in vitro release from polymeric matrix tablets containing centralized drug cores. STP Pharm Sci, 6:182–7.
- Conte U, Maggi L, La Manna A. (1994). Compressed barrier layers for constant drug release from swellable matrix tablets. STP Pharm Sci, 4:107–13.
- Korsmeyer R, Gurny R, Doelker E, Buri P, Peppas N. (1983). Mechanisms of solute release from porous hydrophilic polymers. Int J Pharm, 15:25–35.