Dung PTP, Thanh-Dat T, Quoc-Hoai N, Huu-Manh N, Ngoc-Chien N, Ngoc-Bao T, Cao-Son T, Thi-Hong-Ngoc N, Tung NT. Development of taste masking microcapsules containing azithromycin by fluid bed coating for powder for suspension and
in vivo evaluation.
J Microencapsul 2023:1-12. [PMID:
37129865 DOI:
10.1080/02652048.2023.2209639]
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Abstract
This research aims to develop bitter taste masking microcapsules containing azithromycin by a simpler and familiar method, fluid-bed coating technology, in comparison with Zithromax®. Cores of microcapsules, azithromycin microparticles, were prepared by fluid-bed granulation, then taste-masking polymer was covered on by fluid-bed coating technique. Eudragit L100, Eudragit RL100, ethyl cellulose in single and combined with Eudragit L100, Eudragit E100 were used as taste-masking polymers. The obtained microcapsules were characterized by taste masking ability, in-vitro release, SEM, coating thickness and coating efficiency. Combination of ethyl cellulose and Eudragit E100 (3:1) in coating thickness of 45.13 ± 2.12% w/w prevent azithromycin release from microcapsules below bitter taste threshold (1.78 ± 1.17 μg/ml). Bioavailability of powders containing azithromycin microcapsules and pH modulators (50mg Na3PO4 and 35mg Mg(OH)2) was not significantly different from the reference product (Zithromax®, Pfizer) in the rabbit model (p > 0.05). These results support the possibility of developing a generic product containing azithromycin.
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