The typical dosage range starts at 0.25mg and increases up to 1mg, taken every other day.
The only potential exception is for treating gynecomastia where 7-14 days at 2.5mg may just blast away any early signs.
For bodybuilders, letrozole will help to strip out the unwanted estrogenic effects and provide a much leaner and more ripped appearance. Estrogen can sometimes cause water retention and a much softer, puffier appearance. Letrozole can get rid of any excess water, creating a much leaner, hardcore look to the muscles.