Testosterone treatment for longer than 6 months has not been studied. Experts do not yet know whether it raises risks of breast cancer, heart disease, or dangerous blood clots. It may increase these risks, because some testosterone in the body is made into estrogen. Higher-than-normal estrogen in the body is linked to these risks.
The goal of testosterone treatment is to raise a woman’s testosterone level no higher than what is normal for a young woman. All current testosterone products are made for dosing in men. There is not yet a standard dose or blood test for women, so dosing is adjusted based on your symptoms. You are taking a dose that is too high if you have: