PREPARATION AND CHARACTERIZATION OF CO-CRYSTALS OF DIACEREIN

Raju Rameshrao Thenge, V B Patond, P V Ajmire, L N Barde, N M Mahajan, N P Tekade

Abstract


Diacerein, anti-inflammatory drug used in the treatment of osteoarthritis. Being a BCS class II drug, it has poor solubility, dissolution rate and other physicochemical properties. Thus the aim of present study was to prepare co-crystals of diacerein to improve solubility, dissolution rate. The diacerein co-crystals were prepared using urea and tartaric acid as conformer by Solvent drop grinding method. The diacerein co-crystals were characterized by scanning electron microscopy (SEM), FT-IR spectroscopy (FT-IR), Differential scanning calorimetry (DSC) and X-ray diffractometry (XRD). The co-crystals were evaluated for solubility, dissolution rate and other physicochemical properties and compared with commercial diacern sample. The co-crystals exhibit the difference in the size and shape of crystals. The FT-IR spectra of diacerein co-crystals showed slightly different in the characteristic peaks compared to commercial diacerein sample. DSC data indicate the decrease in the melting endotherm of co-crystals compare to diacerein. The co-crystals with urea showed increase and intense peak and co-crystals with tartaric acid showed decreased number of peaks compared to commercial diacerein. The co-crystals of diacerein formulated in to the Tablet and evaluated for tablet properties. The tablet formulation showed improved tablet characteristics as well as dissolution rate compared to commercial diacerein.


Keywords


Co-crystals; Diacerein; physicochemical properties; FT-IR

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DOI: http://dx.doi.org/10.14499/indonesianjpharm28iss1pp34

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