期刊
DRUG DEVELOPMENT AND INDUSTRIAL PHARMACY
卷 42, 期 4, 页码 535-545出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/03639045.2015.1085872
关键词
Ion exchange resin; ophthalmic drug delivery; pharmacokinetics; sustained-release; tissue distribution toxicity
资金
- Basic Research and Cutting-Edge Technology in Henan Province [122300410103]
The aim of this work was to assess the performance of resin as an ocular delivery system. Timolol maleate (TM) was chosen as the model drug and an ion exchange resin (IER) as the carrier. The drug-resin complex was prepared using an oscillation method and then characterized regarding particle size, zeta potential, morphology, and drug content. After in vitro drug release study and corneal permeation study were performed, in vivo studies were performed in New Zealand albino rabbits using a suspension with particles sized 4.8 +/- 1.2m and drug loading at 43.00 +/- 0.09 %. The results indicate that drug released from the drug-resin ophthalmic suspension permeated the cornea and displayed a sustained-release behavior. Drug levels in the ocular tissues after administration of the drug-resin ophthalmic suspension were significantly higher than after treatment with an eye drop formulation but were lower in body tissues and in the plasma. In conclusion, resins have great potential as effective ocular drug delivery carriers to increase ocular bioavailability of timolol while simultaneously reducing systemic drug absorption.
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