title: Gastroretentive hydrodynamically balanced systems of ofloxacin: In vitro evaluation.
abstract: Hydrodynamically balanced systems (HBSs) of ofloxacin were prepared using lactose, HPMC K4M, PVP K 30, and liquid paraffin, which may increase the mean residence time in the gastrointestinal tract, and may be able to provide maximum drug at the site of absorption to improve oral bioavailability. All these formulated HBS capsules were floated well over 6 h with no floating lag time. They also showed sustained drug release over 6 h. Time for 50% release of ofloxacin was within the range, 2.47 ± 0.02 to 3.07 ± 0.08 h. The in vitro drug release from these HBS capsules was dependent on HPMC K4M, PVP K 30, and liquid paraffin content. The drug release pattern of these HBS capsules containing ofloxacin followed the Higuchi model with the anomalous transport mechanism.
authors: Department of Pharmaceutics, Seemanta Institute of Pharmaceutical Sciences, Mayurbhanj 757086, Orissa, India.
authors: Amit Kumar
authors: AK
authors: Nayak
authors: Biswarup
authors: B
authors: Das
authors: Ruma
authors: R
authors: Maji
keywords: Capsules; Drug release; Gastroretention; HPMC K4M; Hydrodynamically balanced system; Ofloxacin
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