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A Novel Gastro-Retentive Osmotic Pump Capsule Using Asymmetric Membrane Technology: In Vitro and In Vivo Evaluation

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Abstract

Purpose

The purpose of this paper is to develop a novel gastro-retentive osmotic pump capsule using asymmetric membrane technology.

Methods

The physical characteristics of capsule walls and drug delivery behaviors of the system were compared through different coating solutions. The formulation with the glycerin and diethyl phthalate ratio of 5:4 appears to be the best. The thickness of asymmetric membranes was evaluated by withdrawing speed. The relation between the two can be fitted to a linear model. The floating abilities were investigated through filling polyethylene oxide of different molecular weight into the capsules. WSR N-80 (molecular weight 200000) is chosen for the longest floating time. Central composite design-response surface methodology was used to investigate the influence of factors on the responses. The in vivo pharmacokinetics were studied in beagle dogs.

Results and conclusions

A second-order polynomial equation was fitted to the data, and the actual response values are in good accordance with the predicted ones. The optimized formulation displays a complete drug delivery, zero-order release rate and 12 h floating time. The in vivo study results clearly indicate the controlled and sustained release of Famotidine from the system, and the relative bioavailability of this preparation is about 1.605 in comparison to that of the marketed preparation.

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Authors and Affiliations

  1. Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, 110016, China

    Jin Guan, Liying Zhou, Yusheng Pan, Haitao Han, Hongtao Xu & Weisan Pan

Authors
  1. Jin Guan
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  2. Liying Zhou
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  3. Yusheng Pan
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  4. Haitao Han
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  5. Hongtao Xu
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  6. Weisan Pan
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Correspondence to Weisan Pan.

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Guan, J., Zhou, L., Pan, Y. et al. A Novel Gastro-Retentive Osmotic Pump Capsule Using Asymmetric Membrane Technology: In Vitro and In Vivo Evaluation. Pharm Res 27, 105–114 (2010). https://doi.org/10.1007/s11095-009-9984-1

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  • DOI: https://doi.org/10.1007/s11095-009-9984-1

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