Design and assessment of pulsatile technology based chronomodulated delivery systems of nifedipine

Publication date: Available online 26 March 2018Source: Beni-Suef University Journal of Basic and Applied SciencesAuthor(s): Sowjanya Battu, Prasanna Raju Yalavarthi, G.V. Subba Reddy, V. Uma Maheswara Rao, K. Jyothshna Devi, Harini Chowdary VadlamudiAbstractNifedipine has poor aqueous solubility which limits its oral absorption as unit formulation. This limitation was acted through multiparticulate pulsatile systems for the treatment of angina pectoris. Initially, solid dispersions of nifedipine (NF) using sodium starch glycolate (SSG) and guar gum (GG) in 1:1 and 1:2 ratios were processed by kneading technique. Solution layering technique was employed to coat the solid dispersions on non-pareil sugar spheres (∼450 µm) to obtain immediate (NMP 1 and 2) and controlled release pellets (NMP-3 and 4). Controlled release pellets were further coated with Eudragit L100 and RS100 to achieve pulsatile pellets (NMPP-1 to 5). Pellets were subjected to saturation solubility, FTIR, DSC, micromeritics, SEM, drug content, drug release, pharmacokinetic and stability studies. By means of solid dispersions, solubility of NF was increased by 130-folds due to encompassing ordered interparticle mixing of NF and carriers. Significant interactions between NF and carriers were not demonstrated in FTIR spectra as well as in DSC thermograms. Fluidization process again proved its supremacy in producing defined spherical shaped pellets with desired micromeritics. Solution layering process resulted...

Source: Beni Suef University Journal of Basic and Applied Sciences - July 5, 2018 Category: Science Source Type: research