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Adsorption of meloxicam on porous calcium silicate: Characterization and tablet formulation

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Abstract

The purpose of the present study was characterization of microparticles obtained by adsorption of poorly water soluble drug, meloxicam, on a porous silicate carrier Florite RE (FLR) and development of a tablet formulation using these microparticles, with improved drug dissolution properties. The study also reveals the use of FLR as a pharmaceutical excipient. Meloxicam was adsorbed on the FLR in 2 proportions (1∶1 and 1∶3), by fast evaporation of solvent from drug solution containing dispersed FLR. Drug adsorbed FLR microparticles were evaluated for surface topography, thermal analysis, X-ray diffraction properties, infrared spectrum, residual solvent, micromeritic properties, drug content, solubility, and dissolution studies. Microparticles showed bulk density in the range of 0.10 to 0.12 g/cm3. Dissolution of drug from microparticles containing 1∶3, drug∶FLR ratio was faster than microparticles containing 1∶1, drug∶FLR ratio. These microparticles were used for formulating directly compressible tablets. Prepared tablets were compared with a commercial tablet. All the prepared tablets showed acceptable mechanical properties. Disintegration time of prepared tablets was in the range of 18 to 38 seconds, and drug dissolution was much faster in both acidic and basic medium from prepared tablets as compared with commercial tablet. The results suggest that FLR provides a large surface area for drug adsorption and also that a reduction in crystallinity of drug occurs. Increase in surface area and reduction in drug crystallinity result in improved drug dissolution from microparticles.

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Authors and Affiliations

  1. Department of Pharmaceutics, Bharati Vidyapeeth Deemed University, Poona College of Pharmacy, Erandawane, 411038, Pune, Maharashtra State, India

    Sameer Sharma, Praveen Sher, Shraddha Badve & Atmaram P. Pawar

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  1. Sameer Sharma
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  2. Praveen Sher
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  3. Shraddha Badve
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  4. Atmaram P. Pawar
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Correspondence to Atmaram P. Pawar.

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Published: December 7, 2005

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Sharma, S., Sher, P., Badve, S. et al. Adsorption of meloxicam on porous calcium silicate: Characterization and tablet formulation. AAPS PharmSciTech 6, 76 (2005). https://doi.org/10.1208/pt060476

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  • DOI: https://doi.org/10.1208/pt060476

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