This invention relates to a method of increasing testosterone levels and treating hypogonadism and related diseases with the aromatase inhibitor 4,4'-[fluoro-(1-H-1,2,4-triazol-1-yl)methylene]bisbenzonitrile. The present invention further relates to a method of increasing testosterone levels and treating hypogonadism and related diseases with the aromatase inhibitor 4,4'-[fluoro-(1-H-1,2,4-triazol-1-yl)methylene]bisbenzonitrile in a particular dosing regimen. The invention also relates to pharmaceutical compositions comprising said aromatase inhibitor 4,4'-[fluoro-(1-H-1,2,4-triazol-1-yl)methylene]bisbenzonitrile, optionally in combination with other active ingredients. Furthermore, the present invention relates to kits comprising said pharmaceutical compositions together with instructions how to administer them.
