ACTA Pharmaceutica Sciencia 2009 , Vol 51 , Num 3
DESIGN AND CHARACTERIZATION OF BIOADHESIVE MICROSPHERES PREPARED BY DOUBLE EMULSION SOLVENT EVAPORATION METHOD
Aceclofenac (ACE) is NSAIDs of a phenyl acetic acid class. It is indicated in arthritis and osteoarthritis, rheumatoid arthritis, ankylosing spondylitis. It has short elimination half life of 4 hours. The objective of the study is to design, characterize and evaluate bioadhesive microspheres of ACE employing polycarbophil as bioadhesive polymer. Bioadhesive microspheres of ACE were prepared by double emulsion solvent evaporation method. The prepared microspheres were free flowing and spherical in shape and characterized for drug loading, mucoadhesion test, infrared spectroscopy (IR), differential scanning colorimetry (DSC) and scanning electron microscopy (SEM). The in-vitro release studies were performed using pH 6.8 phosphate buffer. The drug loaded microspheres in a ratio of 1:5 showed 38 % of drug entrapment; percentage mucoadhesion was 79 % and 89 % release in 10 h. The infrared spectra and DSC showed stable character of aceclofenac in the drug loaded microspheres and revealed the absence of drug-polymer interactions. SEM studies showed that the microspheres are spherical and porous in nature. The in vitro release profiles from microspheres of different polymer-drug ratios followed Higuchi model. Keywords : ACECLOFENAC, BIOADHESIVE, MICROSPHERES, POLYCARBOPHIL, SOLVENT EVAPORATION METHOD

Istanbul Medipol University