Estrogen Injection

Estrogen increases the risk that you will develop endometrial cancer (cancer of the lining of the uterus [womb]). The longer you use estrogen, the greater the risk that you will develop endometrial cancer. If you have not had a hysterectomy (surgery to remove the uterus), you should be given another medication called a progestin to take with estrogen injection. This may decrease your risk of developing endometrial cancer, but may increase your risk of developing certain other health problems, including breast cancer. Before you begin using estrogen injection, tell your doctor if you have or have ever had cancer and if you have unusual vaginal bleeding. Call your doctor immediately if you have abnormal or unusual vaginal bleeding during your treatment with estrogen injection.Your doctor will watch you closely to help ensure you do not develop endometrial cancer during or after your treatment.

In a large study, women who took estrogen with progestins by mouth had a higher risk of heart attacks, strokes,blood clots in the lungs or legs, breast cancer, and dementia (loss of ability to think, learn, and understand). Women who use estrogen injection alone or with progestins may also have a higher risk of developing these conditions. Tell your doctor if you smoke or use tobacco, if you have had a heart attack or a stroke in the past year, and if you or anyone in your family has or has ever had blood clots or breast cancer. Also tell your doctor if you have or have ever had high blood pressure, high blood levels of cholesterol or fats, diabetes, heart disease, lupus (a condition in which the body attacks its own tissues causing damage and swelling), breast lumps, or an abnormal mammogram (x-ray of the breast used to find breast cancer).

The following symptoms can be signs of the serious health conditions listed above. Call your doctor immediately if you experience any of the following symptoms while you are using estrogen injection: sudden, severe headache; sudden, severe vomiting; speech problems; dizziness or faintness; sudden complete or partial loss of vision; double vision; weakness or numbness of an arm or a leg; crushing chest pain or chest heaviness; coughing up blood; sudden shortness of breath; difficulty thinking clearly, remembering, or learning new things;breast lumps or other breast changes; discharge from nipples; or pain, tenderness, or redness in one leg.

You can take steps to decrease the risk that you will develop a serious health problem while you are using estrogen injection. Do not use estrogen injection alone or with a progestin to prevent heart disease, heart attacks, strokes, or dementia. Use the lowest dose of estrogen that controls your symptoms and only use estrogen injection as long as needed. Talk to your doctor every 3-6 months to decide if you should use a lower dose of estrogen or should stop using the medication.

You should examine your breasts every month and have a mammogram and a breast exam performed by a doctor every year to help detect breast cancer as early as possible. Your doctor will tell you how to properly examine your breasts and whether you should have these exams more often than once a year because of your personal or family medical history.

Tell your doctor if you are having surgery or will be on bedrest. Your doctor may tell you to stop using estrogen injection 4-6 weeks before the surgery or bedrest to decrease the risk that you will develop blood clots.

Talk to your doctor regularly about the risks and benefits of using estrogen injection.

🔔 Why is this medication prescribed?

The estradiol cypionate and estradiol valerate forms of estrogen injection are used to treat hot flushes (hot flashes; sudden strong feelings of heat and sweating) and/or vaginal dryness, itching, and burning in women who are experiencing menopause (change of life; the end of monthly menstrual periods). However, women who need a medication only to treat vaginal dryness, itching, or burning should consider a different treatment. These forms of estrogen injection are also sometimes used to treat the symptoms of low estrogen in young women who do not produce enough estrogen naturally. The estradiol valerate form of estrogen injection is also sometimes used to relieve the symptoms of certain types of prostate (a male reproductive organ) cancer. The conjugated estrogens form of estrogen injection is used to treat abnormal vaginal bleeding that a doctor has decided is caused only by a problem with the amounts of certain hormones in the body. Estrogen injection is in a class of medications called hormones. It works by replacing estrogen that is normally produced by the body.

🔔 How should this medicine be used?

The estradiol cypionate and estradiol valerate forms of long acting estrogen injection come as a liquid to inject into a muscle. These medications are usually injected by a health care professional once every 3 to 4 weeks. When the estradiol valerate form of estrogen injection is used to treat the symptoms of prostate cancer, it is usually injected by a health care professional once every 1 to 2 weeks.

The conjugated estrogens form of estrogen injection comes as a powder to mix with sterile water and inject into a muscle or vein. It is usually injected by a health care professional as a single dose. A second dose may be injected 6 to 12 hours after the first dose if it is needed to control vaginal bleeding.

If you are using estrogen injection to treat hot flushes, your symptoms should improve within 1 to 5 days after you receive the injection. Tell your doctor if your symptoms do not improve during this time.

Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient.

🔔 Other uses for this medicine

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.