A composition of the present invention comprises an effective amount of rifabutin, an effective amount of clarithromycin, an effective amount of clofazimine, and an effective amount of an absorption enhancer, wherein the effective amount of the absorption enhancer is sufficient so that, when the composition is administered to a patient, an overall metabolism of clarithromycin as caused by rifabutin is reduced by shifting competing metabolism of rifabutin and clarithromycin so as to result in more active clarithromycin.
