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 PP  Vol.5 No.12 , November 2014
Improving Flow Property of Nifedipine Loaded Solid-Lipid Nanoparticles by Means of Silica for Oral Solid Dosage Form
Ranjan Kumar Barman1,2, Yasunori Iwao1, Shuji Noguchi1, Mir Imam Ibne Wahed2, Shigeru Itai1*
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Abstract: In this study, a new formulation of silica nanocomposite containing nifedipine (NI) loaded freeze-dried solid-lipid nanoparticles (NI-SLNs) and silica have been developed with improved flowability of powders, which can lead to the formulation of a widely acceptable oral dosage form. The stable NI-SLNs were prepared using two phospholipids, hydrogenated soybean phosphatidylcholine and dipalmitoylphosphatidylglycerol mixed with 2.5% w/v trehalose as a cryoprotectant followed by lyophilization. We employed various grades of two types of silica, such as fumed and precipitated. Silica improved the poor flow property of NI-SLNs to good category as per USP-29. In addition, most of the silica nanocomposites showed the satisfactory results in their physicochemical properties such as particle size, polydispersity index, zeta potential, and recovered potency by around 100 nm, 0.3, -50 mV, and 80%, respectively. Furthermore, it was found that NI-SLNs were easily released form nanocomposites within 30 min, therefore, suggesting an improvement of drug dissolutions. Among them, precipitated silica cooperated fairly in improving the powder characteristics as well as the physicochemical, morphological, and pharmaceutical properties.
Keywords: Silica, Solid-Lipid Nanoparticle, Solid Dosage Form, Nifedipine, Flowability
Cite this paper: Barman, R. , Iwao, Y. , Noguchi, S. , Wahed, M. and Itai, S. (2014) Improving Flow Property of Nifedipine Loaded Solid-Lipid Nanoparticles by Means of Silica for Oral Solid Dosage Form. Pharmacology & Pharmacy, 5, 1119-1129. doi: 10.4236/pp.2014.512122.
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