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Research Paper Open Access
Clofazimine is one of the important drugs used in the multi drug therapy of leprosy. Being highly lipophilic, it is practically insoluble in water and and has a variable oral bioavailability in man.Physical mixtures and solid dispersions of clofazimine with mannitol and polyethylesglycol 6000 in different drug- carrier ratios were prepared in an attempt to improve its dissolution. Differential thermal analysis (DTA), X-ray diffraction (XRD) analusis and dissolution studies were performed to evaluate the formulations. The dissolution rate of clofazimine was markedly increased in solid dispersions of PEG 6000 as well as mannitol. The former material was more promising as a carrier. DTA and XRD studies revealed that clofazimine does not enter crystal lattice of the two carriers studied.