Adv Pharm Bull. 2015;5(3):403-409.
doi: 10.15171/apb.2015.055
PMID: 26504763
PMCID: PMC4616897
Scopus id: 84983585719
  Abstract View: 368
  PDF Download: 183

Original Research

Furosemide Loaded Silica-Lipid Hybrid Microparticles: Formulation Development, in vitro and ex vivo Evaluation

Swapna Sambaraj 1, Divya Ammula 2, Vijaykumar Nagabandi 2 *

1 Department of Industrial Pharmacy, St. Peter’s Institute of Pharmaceutical Sciences, Vidyanagar, Hanamkonda, Warangal, Telangana State, India.
2 Department of Pharmaceutics, St. Peter’s Institute of Pharmaceutical Sciences, Vidyanagar, Hanamkonda, Warangal, Telangana State, India.


Purpose: The main objective of the current research work was to formulate and evaluate furosemide loaded silica lipid hybrid microparticles for improved oral delivery. A novel silica-lipid hybrid microparticulate system is used for enhancing the oral absorption of low solubility and low permeability of (BCS Class IV) drugs. Silica-lipid hybrid microparticles include the drug solubilising effect of dispersed lipids and stabilizing effect of hydrophilic silica particles to increase drug solubilisation, which leads to enhanced oral bioavailability.

Methods: The slica lipid hybrid (SLH) microparticles were composed of poorly soluble drug (furosemide), dispersion of oil phase (Soya bean oil and miglyol) in lecithin (Phospholipoid 90H), non-ionic surfactant (Polysorbate 80) and adsorbent (Aerosol 380). Saturation solubility studies were performed in different oils and surfactants with increased concentration of drug revealed increased solubility of furosemide.

Results: In vitro dissolution studies conducted under simulated gastric medium revealed 2-4 fold increase in dissolution efficiencies for SLH microparticles compared to that of pure drug (furosemide) and marketed formulation Lasix®. Ex vivo studies showed enhanced lipid digestibility, which improved drug permeability. Solid-state characterization of SLH microparticles by X-ray powder diffraction and Fourier transform infrared spectroscopic analysis confirmed non-crystalline nature and more compatibility of furosemide in silica-lipid hybrid microparticles.

Conclusion: It can be concluded that the role of lipids and hydrophilic silica based carrier highlighted in enhancing solubility and permeability, and hence the oral bioavailability of poorly soluble drugs.

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Submitted: 01 Jan 2015
Revised: 16 Apr 2015
First published online: 19 Sep 2015
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