The Food and Drug Administration (FDA) has removed black box warnings from most hormone replacement therapy (HRT) products used to treat symptoms of menopause. Recent clinical trials and long-term studies show that early initiation of HRT significantly improves health outcomes and reduces risks of heart disease and dementia.
In 2003, the FDA added black box warnings to HRT products because the Women’s Health Initiative (WHI) study showed increased risks of breast cancer, cardiovascular disease and dementia. However, WHI had limitations: participants averaged 63 years old (well beyond typical menopause onset); older hormone formulations were used and timing of therapy initiation wasn't considered. Those with high levels of education and white women were overrepresented in the WHI study. These factors led to decades of caution and underutilization of HRT.