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Glass Transition Dynamics and Physical Stability of Amorphous Griseofulvin in Binary Mixtures with Low Tg excipients.

08:00 EDT 9th July 2019 | BioPortfolio

Summary of "Glass Transition Dynamics and Physical Stability of Amorphous Griseofulvin in Binary Mixtures with Low Tg excipients."

Amorphization of drug formulations containing active pharmaceutical ingredients (APIs) and excipients has been proven to be an effective strategy to improve their poor aqueous solubility. The excipients can also impact on the physical stability of the prepared amorphous forms. Generally, researchers are more apt to select excipients that have high value of the glass transition temperature Tg because of the antiplasticization effect of the additives on APIs. In this article, we studied the glass transition dynamics as well as crystallization behavior in binary blends composed of griseofulvin (GSF) and two low - Tg additives, octaacetylmaltose (acMAL) and polyvinyl acetate (PVAc), with particular focus on the plasticization effect. Effectively suppressed crystallization of GSF is observed in both systems when higher excipient contents are used. Our finding aims to encourage the use of specifically developed protocols, in which suitable plasticizers are used as excipients for stabilizing the amorphous state of a drug.

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This article was published in the following journal.

Name: Molecular pharmaceutics
ISSN: 1543-8392
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