The present invention relates to pharmaceutical compositions and more particularly to a pharmaceutical composition containing the compound {1S-[1.alpha., 2.alpha.,3ß(1S*,2R*),5ß]}-3-(7-{[2-(3,4-difluorophenyl)cyclopropyl]amino}-5-(propylthio)-3H-1,2,3-triazolo[4,5-d]pyrimidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol.