(HealthDay)—Jatenzo (testosterone undecanoate) has been approved by the U.S. Food and Drug Administration to treat men with low testosterone, medically called hypogonadism. The approval covers men with low levels of the male hormone due to specific medical conditions, including genetic disorders such as Klinefelter syndrome or tumors that have damaged the pituitary gland, the agency said in a news release. Jatenzo should not be used to treat men with “age-related...