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Hormone Replacement Therapy


What is Menopause?
Menopause, or climacteric, is the time in a woman's life when menstruation ends and the ovaries produce lower levels of the sex hormones-estrogen and progesterone.
Progesterone becomes nearly absent, and
estrogen levels are reduced to approximately one-tenth of pre-menopause levels. Menopause usually occurs between the ages of 45 and 55, although it varies between individuals.

During menopause, many women experience problems such as hot flashes, night sweats, sleeplessness, mood swings, and vaginal dryness. Bone loss (osteoporosis), angina, and heart attack (coronary artery disease) are also more common in women after menopause.

What Is Hormone Replacement Therapy?
To counter some of the problems often associated with menopause or to prevent some long-term conditions that are more common in postmenopausal women medical doctors may recommend using hormone replacement therapy (HRT) for a period from one month to five or more years.1

HRT usually involves treatment with either estrogen alone or estrogen in combination with progesterone. Progestin, a synthetic hormone with effects similar to those of progesterone, may be used as a substitute. The use of these substances can effectively double hormone levels in post-menopause women, but this therapy does not produce the natural hormone levels seen before menopause.

Do the Benefits Outweigh the Risks?
The best evidence to date for the risks and benefits of HRT comes from the Women's Health Initiative (WHI) study, in which 16,000 healthy women, ages 50 through 79, took either hormones or a placebo. The trial was discontinued early in 2002, when investigators reported that the overall risks of estrogen plus progestin outweighed the benefits.2

According to recent studies, HRT with estrogen plus progestin may increase the risk of:
• Dementia by 50 percent6
• Blood clots by 50 percent2
• Stroke by 41 percent2
• Heart disease by 29 percent2
• Breast cancer by 26 percent2  The breast cancers were also slightly larger and more advanced.3 The risk increased with prolonged duration of hormone use and returned to normal five or more years after hormone use was discontinued.4
• Death from ovarian cancer from 24.6 to 64 cases-in 100,000 women who used estrogens for 10 or more years.7

Benefits of the use of estrogen plus progestin:
• Relief for menopausal symptoms2
• Fewer cases of hip and spine fractures2
• Reduction in the risk of developing colon cancer by 37 percent was reported among women
using estrogen plus progestin.2 Studies do suggest, however, that to maintain bone density,
women must continue taking the hormone. To date, HRT has not been proven beneficial in older
women with pre-existing heart disease.5 Additionally, the use of estrogen plus progestin hasn't been shown to affect post-menopausal women's general health, vitality, mental health, depressive symptoms, or sexual satisfaction.8

Are There Alternative Therapies to HRT?
While hormone therapy can have short-term benefits, many short-term menopause-related symptoms will eventually disappear, and many frequently require no treatment. However, although there are substantial concerns about the use of HRT, it has not been proven beneficial for long-term menopausal problems.

Exercising regularly, eating healthy foods, and not smoking is always good. A healthy lifestyle helps to decrease the risk of bone loss. Health professionals also recommend taking calcium and vitamin D supplements to prevent osteoporosis.9 The effect of calcium and vitamin D supplements on hip, spine, and wrist fractures, as well as on colon cancer, is being tested.

Some foods and nutritional supplements can be helpful in reducing the symptoms of menopause:
• Estrogen-containing foods: soy-based products, whole-grain cereals, fruits, vegetables
• Evening primrose
• Black cohosh
• Dong quai
• Vitamin E
• Vitamin B complex
• Hormone creams

The benefits and risks of most of these agents are not definitively proven, but are being researched.9 Before taking any dietary supplement, consult with your health care provider.

1. Brett KM, Madans JH. Use of menopausal hormone replacement therapy: estimates from a nationally representative cohort study. Am J Epidemiology 1997;145(6):536-45.
2. Writing Group for the Women's Health Initiative. Risks and benefits of combined estrogen and progestin in healthy menopausal women: Principal results from the Women's Health Initiative randomized controlled trial. JAMA 2002;288:321-333.
3. Chlebowski RT, Hendrix SL, Langer RD, Stefanick ML, Gass M, Lane D, et al. Estrogen Plus Progestin Influence on Breast Cancer and Mammography in Healthy Postmenopausal Women in the Women's Health Initiative Randomized Trial. JAMA 2003;289:3243.
4. Schairer C, Lubin J, Troisi R, Sturgeon S, Brinton L, Hoover R. Menopausal estrogen and estrogen- progestin replacement therapy and breast cancer risk. JAMA 2000;283(4):485-491.
5. Grady D, Herrington D, Bittner V, Blumenthal R, Davidson M, Hlatky M, et al. Cardiovascular disease outcomes during 6.8 years of hormone therapy. JAMA 2002; 288:49-57.
6. Shumaker, SA, Legault C, Rapp SR, Thal L, Wallace RB, Ockene JK, et al. Estrogen plus progestin and the incidence of dementia and mild cognitive impairment in postmenopausal women. JAMA 2003;289:2651-2662.
7. Rodriguez C, Patel AV, Calle EE, Jacob EJ, Thun MJ. Estrogen replacement therapy and ovarian cancer mortality in a large prospective study of US women. JAMA 2001;285(11):1460-1465.
8. Hays J, Ockene JK, Brunner RL, Kotchen JM, Manson JE, Patterson RE, et al. Effects of estrogen plus progestin on health-related quality of life. N Engl J Med 2003;348: 1839-54.
9. Keller C, Fullerton J, Mobley C. Supplemental and complementary alternatives to hormone replacement therapy. Amer Acad Nurse Pract 1999;11(5):187-98.

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