This medicine is a Estrogen Derivative used for treatment of symptoms of menopause.

What key warnings should I know about before taking this medicine?
Estrogens, when used in women after menopause, may increase the risk of cancer of the uterus. Unusual vaginal bleeding may be a warning sign for this type of cancer. Report any unusual vaginal bleeding to your healthcare provider. Do not take estrogens if you are pregnant. Estrogens may cause birth defects to your unborn child. Contact your healthcare provider if you think you may be pregnant.

Reasons not to take this medicine
If you have an allergy to estrogens or any other part of the medicine.
If you have any of the following conditions: Vaginal bleeding of an unknown cause, known or suspected breast cancer except where the cancer has spread, a history of blood clots caused by estrogen use, a tumor where estrogen makes it grow, liver disease.
If you are pregnant or think you may be pregnant.

What is this medicine used for?
This medicine is used to stop or reduce the symptoms of menopause. This includes hot flashes, and vaginal dryness, itching, or burning.
It helps to prevent osteoporosis (brittle bones; can lead to breaks) in women past menopause. This medicine works best when used with calcium and vitamin D supplements, weight-bearing exercises like walking or physical therapy. May also be used to lower high cholesterol in women who have gone through menopause.
The cream may be used vaginally to treat irritation and itching caused by menopause.
It is used for the treatment of certain types of cancer (breast or prostate), female hypogonadism, female castration, and primary ovarian failure.

How does it work?
After menopause, when the body no longer produces estrogen, it is used as a simple replacement of estrogen.