The present invention relates to pharmaceutical compositions of (3S,11aR)- N-[(2,4-difluorophenyl)methyl]-2,3,5,7,11,11a-hexahydro-6-hydro xy-3-methyl-5,7- dioxo-oxazolo[3,2-a]pyrido[1,2-d]pyrazine-8-carboxamide, useful in the treatment or prevention of Human Immunodeficiency Virus (HIV) infections.La presente invención se refiere a composiciones farmacéuticas de (3S, 11aR)-N-[(2, 4-difluorofenil)metil]-2, 3, 5, 7,11,11a-hexahidro-6-hidroxi-3-metil-5, 7-dioxo-oxazolo[3, 2-a]pirido[1 ,2-d]pirazin-8-carboxamida, útiles en el tratamiento o prevención de infección por Virus de Inmunodeficiencia Humana (VIH).
