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Management of Menopausal Symptoms

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Management of Menopausal Symptoms The new england journal of medicine clinical practice Management of Menopausal Symptoms Deborah Grady, M.D., M.P.H. This Journal feature begins with a case vignette highlighting a common clinical problem. Evidence supporting various strategies is then presented, followed by a review of formal guidelines, when they exist. The article ends with the author’s clinical recommendations. A 51-year-old woman has frequent and distressing hot flushes that interfere with her work and sleep, and vaginal dryness that makes sexual intercourse with her husband uncomfortable. She is otherwise healthy. How should her case be managed? The Clinical Problem Menopausal Transition From the Women’s Health Clinical Re- All healthy women transition from a reproductive, or premenopausal, period, marked search Center, University of California, by regular ovulation and cyclic menstrual bleeding, to a postmenopausal period, San Francisco, and the San Francisco Veter- ans Affairs Medical Center — both in San marked by amenorrhea (Table 1). The onset of the menopausal transition is marked Francisco. Address reprint requests to by changes in the menstrual cycle and in the duration or amount of menstrual Dr. Grady at the Women’s Health Clinical flow.1 Subsequently, cycles are missed, but the pattern is often erratic early in the Research Center, 1635 Divisadero St., Suite 600, San Francisco, CA 94115. menopausal transition. Menopause is defined retrospectively after 12 months of amenorrhea. N Engl J Med 2006;355:2338-47. The menopausal transition usually begins in the mid-to-late 40s and lasts about Copyright © 2006 Massachusetts Medical Society. 4 years, with menopause occurring at a median age of 51 years. Cigarette smokers undergo menopause about 2 years earlier than nonsmokers. During the early meno- pausal transition, estrogen levels are generally normal or even slightly elevated; the level of follicle-stimulating hormone begins to increase but is generally in the normal range2 (Table 1). As the menopause transition progresses, hormone levels are vari- able, but estrogen levels fall markedly and levels of follicle-stimulating hormone increase. After menopause, ovulation does not occur. The ovaries do not produce estradiol or progesterone but continue to produce testosterone. A small amount of estrogen is produced by the metabolism of adrenal steroids to estradiol in periph- eral fat tissue. Women in the menopausal transition commonly report a variety of symptoms, including vasomotor symptoms (hot flushes and night sweats), vaginal symptoms, urinary incontinence, trouble sleeping, sexual dysfunction, depression, anxiety, labile mood, memory loss, fatigue, headache, joint pains, and weight gain. However, in longitudinal studies, after adjusting for age and other confounders, only vaso- motor symptoms, vaginal symptoms, and trouble sleeping are consistently associ- ated with the menopausal transition.3,4 Symptoms such as memory loss and fatigue may be due to frequent hot flushes or trouble sleeping. Vasomotor Symptoms A hot flush is a sudden feeling of warmth that is generally most intense over the face, neck, and chest. The duration is variable but averages about 4 minutes. It is often accompanied by sweating that can be profuse and followed by a chill. The preva- lence of hot flushes is maximal in the late menopausal transition, occurring in 2338 n engl j med 355;22 www.nejm.org november 30, 2006 Downloaded from www.nejm.org by EDWARD SCHNEIDER MD on May 8, 2007 . Copyright © 2006 Massachusetts Medical Society. All rights reserved. clinical practice Table 1. Stages of the Menopausal Transition, Ranges of Hormone Levels, and the Prevalence of Hot Flushes. Menopausal Transition Postmenopausal Variable Reproductive Years (Perimenopause) Years Early Peak Late Early Late Early Late Menstrual cycle Regular or Regular Variable cycle 3 or more None variable length; 1 or 2 missed cycles missed cycles per yr per yr Range of steroid hormones (pg/ml) Estradiol 50–200 50–200 or slightly higher 40 0–15 Testosterone 400 400 400400 Range of pituitary hormones (mU/ml) Follicle-stimulating hormone 10 on days 2–4 10 or higher on days 2–4 >100 Luteinizing hormone 10 on days 2–4 10 or higher on days 2–4 >100 Prevalence of hot flushes (%) 10 40 65 50 10–15 about 65% of women5 (Table 1), but the preva- of follicle-stimulating hormone were the only hor- lence varies markedly, depending on the defini- monal measure independently associated with tion of flushing and the population studied. In the flushing after adjustment for levels of estradiol United States, flushes are more common in black and other hormones.2 A possible role for andro- and Latina women and less common in Chinese gens is suggested by the observation that flush- and Japanese women than in white women.6 Ciga- ing is common among men treated with andro- rette smoking increases the likelihood of flush- gen-deprivation therapy for prostate cancer. ing5; other factors — including surgical meno- pause, physical activity, body-mass index, alcohol Vaginal Symptoms consumption, and socioeconomic status — have Vaginal symptoms (including dryness, discomfort, been inconsistently associated with hot flushes.4 itching, and dyspareunia) are reported by about It is not possible to predict whether a particular 30% of women during the early postmenopausal woman will have hot flushes. period4 and up to 47% of women during the later In most women, hot flushes are transient. The postmenopausal period.3 Urologic symptoms (in- condition improves within a few months in cluding urgency, frequency, dysuria, and inconti- about 30 to 50% of women and resolves in 85 to nence) are not clearly correlated with the meno- 90% of women within 4 to 5 years.7 However, pausal transition.3 Unlike hot flushes, vaginal for unclear reasons, about 10 to 15% of women symptoms generally persist or worsen with aging. continue to have hot flushes many years after As compared with premenopausal women, menopause. postmenopausal women with vaginal symptoms Hot flushes resemble heat-dissipation respons- generally have decreased vaginal blood flow and es and may represent abnormal thermoregula- secretions, hyalinization of collagen, fragmenta- tion by the anterior hypothalamus. The precise tion of elastin, and proliferation of vaginal con- role of estrogen in the pathogenesis of this symp- nective tissue. Vaginal fluid, which is acidic be- tom is not clear. Endogenous estrogen levels do fore menopause, becomes more neutral, facilitating not differ substantially between postmenopausal the proliferation of enteric organisms associated women who have hot flushes and those who do with urinary tract infection. not have them.2 Flushes do not occur in women The responsiveness of many of these physio- with gonadal dysgenesis unless estrogen therapy logic changes to estrogen therapy suggests that is used and then discontinued,8 which suggests estrogen deficiency may contribute to the patho- that estrogen withdrawal is important. In the genesis. However, vaginal symptoms have been Study of Women’s Health Across the Nation, a associated with lower serum levels of androgens large U.S. multicenter cohort study, higher levels but not of estrogens.9 n engl j med 355;22 www.nejm.org november 30, 2006 2339 Downloaded from www.nejm.org by EDWARD SCHNEIDER MD on May 8, 2007 . Copyright © 2006 Massachusetts Medical Society. All rights reserved. The new england journal of medicine Strategies and Evidence out other potential causes of symptoms, including trauma and infection. History taking that includes Evaluation age and menopausal status and pelvic examina- Vasomotor Symptoms tion are generally sufficient for diagnosis. Find- Classic vasomotor symptoms in a woman in her ings of an elevated pH level in vaginal fluid (above late 40s to mid-50s do not require laboratory eval- 6.0) and cytologic analysis of exfoliated cells from uation unless there is reason to suspect another the vaginal wall containing more than 20% para- cause. Careful history taking can generally rule basal cells are correlated with menopause, but out other causes, such as alcohol consumption, their use in the diagnosis of symptomatic vaginal carcinoid, the dumping syndrome, hyperthyroid- atrophy has not been established. ism, narcotic withdrawal, pheochromocytoma, and medications including nitrates, niacin, gonad- Treatment of Vasomotor Symptoms otropin-releasing hormone agonists, and anti- Because the self-reported frequency and severity estrogens. Levels of follicle-stimulating hormone of hot flushes improve markedly with placebo, and luteinizing hormone may be within the nor- conclusive evidence of efficacy of treatments re- mal premenopausal range during the menopaus- quires findings from randomized, controlled tri- al transition; measurement of these hormones is als. Such evidence is the only type that was used not routinely recommended (Table 1). to support treatment recommendations in this re- view. Clinical trials of treatments for hot flushes Vaginal Atrophy have typically been small and brief, and provide Postmenopausal vaginal atrophy is generally iden- little information about longer-term efficacy and tified when there are vaginal symptoms and find- risks. ings of pallor, dryness, and decreased rugosity of the vaginal mucosa. A pelvic examination should Behavioral and Alternative Therapies be performed to look for these signs and to rule Many women have mild flushes and obtain ade- quate relief with simple measures, such as lower- Table 2. Efficacy of Treatment of Hot Flushes with Various Doses
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