Patent Summary: "Pharmaceutical compositions comprising rifamixin and amino acids, method of preparation and use thereof". It is the object of the present invention to provide rifamixin compositions comprising amino acids which increase the solubility of rifamixin in aqueous solutions. Rifamixin compositions comprising amino acids are useful in treating amino acid diseases and rifamixin are effective. The present invention relates to pharmaceutical compositions comprising rifamixin or one of the pharmaceutically acceptable salts thereof and one or more amino acids, wherein the amino acid to rifamixin molar ratio is between 1: 1 and 10: 1, preferably 1: 1 and 5: 1, together with pharmaceutically acceptable excipients. furthermore, the present invention relates to rifamixin crystals obtained by a process comprising: a) dissolving rifamixin and amino acid compositions, where amino acids and rifamixin are in molar ratio between 1: 1 and 10: 1, in solutions formed by ethanol / water, at a volumetric ratio of 1: 1 to 1:10 (v / v)； b) evaporation of the solution obtained in (a) at temperatures between room temperature and 40 ° C, in a period of time between 1 and 10 days； where resulting crystals have the p21 monoclinic space group and cellular parameters in the ranges: a: 13.7 (1) -13.8 (1) å； b: 19.7 (1) -19.9 (1) å； c: 16.4 (6) -16.6 (6) δ； ß: 92.1 (1) -91.9 (1) degrees.resumo patente de invenção: "composições farmacêuticas compreendendo rifamixinaa e aminoácidos, método de preparação e uso das mesmas". constituem o objetivo da presente invenção composições de rifamixina compreendendo aminoácidos, que aumentam a solubilidade da rifamixina em soluções aquosas. composições de rifamixina compreendendo aminoácidos são úteis no tratamento de doenças nos aminoácidos e rifamixina são eficazes. a presente invenção refere-se a composições farmacêuticas compreendendo rifamixina ou um dos sais farmaceuticamente aceitáveis da mesma e um ou mais aminoácidos, em que a relação molar e
