Described herein are methods for the synthesis of 3-[5-(pyridin-2-ylmethoxy)-3-(2-methyl-2-propylthio)-1-[4-(2-methoxypyridin-5-yl)benzyl]-indol-2-yl]-2,2-dimethyl-propionic acid, pharmaceutically acceptable salts, pharmaceutically acceptable solvates thereof. Also described are pharmaceutical compositions suitable for oral administration to a mammal that include, as well as methods of using such oral pharmaceutical compositions for treating respiratory conditions or diseases, as well as other leukotriene-dependent or leukotriene mediated conditions or diseases.