Nanocrystal recovery by use of carrier particles

Khan, Shahzeb and de Matas, Marcel and Plakkot, Smitha and Anwar, Jamshed (2014) Nanocrystal recovery by use of carrier particles. Crystal Growth and Design, 14 (3). pp. 1003-1009. ISSN 1528-7483

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Aqueous dispersions of nanoparticles (nanosuspensions) of poorly soluble drugs are an effective option for addressing issues of low and erratic bioavailability. They are, however, not attractive as dosage forms due to their predisposition to physical and chemical instability. Here we describe an effective method for isolating nanocrystals in solid form from a suspension, which opens up the possibility of formulating nanocrystals in solid dosage forms such as tablets. The method involves the use of carrier particles to adsorb and recover nanocrystals from a liquid suspension. The method is illustrated by using carrier particles of dibasic calcium phosphate to recover nanocrystals of ibuprofen and glibenclamide produced by both size reduction and crystallization. Respective recoveries of the nanocrystals were in excess of 90%. Powders of carrier-nanocrystal particles yielded dissolution rates similar to those of the native nanocrystals and substantially faster than marketed tablets and micronized suspensions of the drugs, confirming that the high surface area of the nanocrystals is retained during the adsorption process.

Item Type:
Journal Article
Journal or Publication Title:
Crystal Growth and Design
Uncontrolled Keywords:
?? dry powder inhalersdrug-deliverynanoparticlesformulationsinhalationforcesnanosuspensionsdissolutionmorphologyconversiongeneral materials sciencegeneral chemistrycondensed matter physicsmaterials science(all)chemistry(all) ??
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Deposited On:
24 Jul 2014 10:02
Last Modified:
16 Jul 2024 09:35