The present invention relates to certain cyclopropyl amide compounds, pharmaceutical compositions comprising such compounds, and methods of treating cancer, including leukemias and solid tumors, inflammatory diseases, osteoporosis, atherosclerosis, irritable bowel syndrome, and other diseases and medical conditions, with such compounds and pharmaceutical compositions. The present invention also relates to certain cyclopropyl amide compounds for use in inhibiting nicotinamide phosphoribosyltransferase ("NAMPT").