Solid-in-Oil-in-Water Emulsion: An innovative paradigm to improve drug stability and biological activity

Sawant, Anali and Kamath, Seema and Hemanth, KG and Pai, Girish K (2021) Solid-in-Oil-in-Water Emulsion: An innovative paradigm to improve drug stability and biological activity. American Association of Pharmaceutical Scientists, 22 (199). pp. 1-14. ISSN 1530-9932

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An emulsion is a biphasic dosage form comprising of dispersed phase containing droplets that are uniformly distributed into a surrounding liquid which forms the continuous phase. An emulsifier is added at the interface of two immiscible liquids to stabilize the thermodynamically unstable emulsion. Various types of emulsions such as waterin-oil (w-o), oil-in-water (o-w), microemulsions, and multiple emulsions are used for delivering certain drugs in the body. Water (aqueous) phase is commonly used for encapsulating proteins and several other drugs in water-in-oil-in-water (w-o-w) emulsion technique. But this method has posed certain problems such as decreased stability, burst release, and low entrapment efficiency. Thus, a novel “solid-in-oil-in-water” (s-o-w) emulsion system was developed for formulating certain drugs, probiotics, proteins, antibodies, and tannins to overcome these issues. In this method, the active ingredient is encapsulated as a solid and added to an oil phase, which formed a solid-oil dispersion. This dispersion was then mixed with water to form a continuous phase for enhancing the drug absorption. This article focuses on the various studies done to investigate the effectiveness of formulations prepared as solid-oil-water emulsions in comparison to conventional water-oil-water emulsions. A summary of the results obtained in each study is presented in this article. The s-o-w emulsion technique may become beneficial in near future as it has shown to improve the stability and efficacy of the entrapped active ingredient.

Item Type: Article
Uncontrolled Keywords: Solid-in-oil-in-water emulsions; water-in-oil-in-water; solid-state proteins; entrapment efficiency.
Subjects: Pharmacy > MCOPS Manipal > Pharmaceutics
Depositing User: KMC Library
Date Deposited: 25 Aug 2021 08:33
Last Modified: 25 Aug 2021 08:33

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