Development and Evaluation of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and Polycaprolactone Microparticles of Nimodipine

Author(s): Manoela K. Riekes, Luiz R. Olchanheski Junior, Rafael N. Pereira, Paola A.A. Borba, Daniel Fernandes, Hellen K. Stulzer.

Journal Name: Current Pharmaceutical Design

Volume 19 , Issue 41 , 2013

Abstract:

Polymeric microparticles containing the calcium channel blocker nimodipine were successfully obtained through simple emulsion/ organic solvent evaporating method. The extended release formulations, composed by the polymers poly(3-hydroxybutyrate-co-3- hydroxyvalerate) (PHBV) and polycaprolactone (PCL), were submitted to characterization through X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TG), Fourier transform infrared analysis (FT-IR) and determination of the mean particle diameter. All formulations obtained revealed an amorphous characteristic, proven through XRPD and DSC results. Besides, no chemical interaction was observed between drug and polymer in polymeric microparticles. PHBV-NMP formulation showed a higher drug entrapment, a larger particle size, a thermal degradation behavior similar to that observed for nimodipine and a longer drug release time, being selected for in vivo evaluation. The PHBV-NMP polymeric microparticles were able to keep the pharmacological antihypertensive effect for a longer period of time, becoming a good alternative to control nimodipine release in hypertension treatment.

Keywords: Nimodipine, PCL, PHBV, microparticles.

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Article Details

VOLUME: 19
ISSUE: 41
Year: 2013
Page: [7264 - 7270]
Pages: 7
DOI: 10.2174/138161281941131219125657
Price: $58

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