Common Issues in Female Sexual Dysfunction

Psychiatric TimesPsychiatric Times Vol 25 No 5
Volume 25
Issue 5

"I've lost my interest in sex." As psychiatrists, we hear this concern (if we ask) from women in a variety of situations: those who are depressed, postpartum, menopausal, traumatized, and those who have been treated with psychotropic medications. Thankfully, we have many interventions, both behavioral and pharmacological, to use in addressing sexual issues.

"I've lost my interest in sex." As psychiatrists, we hear this concern (if we ask) from women in a variety of situations: those who are depressed, postpartum, menopausal, traumatized, and those who have been treated with psychotropic medications. Thankfully, we have many interventions, both behavioral and pharmacological, to use in addressing sexual issues.

Patients are often reticent about bringing up sexual problems or asking for solutions to sexual issues and will wait for the psychiatrist to initiate the discussion. However, psychiatrists themselves may be hesitant to start the discussion. A host of countertransference and practical issues, including time to address concerns, insufficient training, and fear of being accused of boundary violation, consciously and unconsciously, inhibit psychiatrists from asking sex-related questions.

However, psychiatrists must make the effort to start a dialogue, because they are likely in the best position to treat women with sexual difficulties. By talking with the patient and understanding her medical and sexual history, the psychiatrist will be able to assess sexual problems and provide treatment recommendations.

This article briefly reviews some of the most commonly encountered reasons for female sexual dysfunction (SD) and discusses some medical treatment strategies.

Sexual health
A woman's sexual health can be affected by her upbringing. The relationship she had with her parents-whether warm and affectionate or cold and remote-can play a crucial role. Her role models and the type and extent of experimentation and stimulation (eg, too much, too early) impact her sexual health. Her social, cultural, and religious values also may impact her sexuality. Her body image, whether she focuses on positive (or, too commonly, negative) aspects; medical or surgical history; medications; pain; and past relationships may affect her sexual health.

If SD is caused by underlying psychodynamic issues, such as sexual trauma, dislike of her partner, or lack of sexual attraction with a particular partner, medication will not solve the problem. Although psychotherapeutic approaches will not be discussed in this article, a strong therapeutic relationship and willingness to discuss any underlying psychodynamic issues are important aspects of helping women address disorders of desire and responsiveness.

Vulnerable times for sexual function and engagement
Psychiatrists should be aware that there are periods in a woman's life when she may be particularly susceptible to lowered sexual interest and response (eg, premenstrual, pregnancy, postpartum, menopause).

Premenstrual exacerbation of depression and anxiety, premenstrual tension, and premenstrual dysphoric disorder are associated with decreasing estrogen levels before menstruation. As estrogen decreases, so does serotonin, which puts the woman at higher risk for SD.1

One of the concerns most expectant parents have is how pregnancy will affect the most intimate aspects of their relationship. As a woman's body changes, sexual feelings and perceptions may also change. Having a baby can be an affirmation of a woman's sexuality. Both men and women enjoy the increased size and fullness of her breasts. By the last trimester, however, the body changes are dramatic and sometimes unwieldy. Lower back or pelvic ligament pain, pressure on the bladder, and fatigue are not very conducive to satisfactory sexual encounters. Comfortable positions may be difficult to find, and with the baby kicking, it is sometimes difficult for partners to feel alone and focus on intimacy. Some suggestions are:

• Avoid anything that is emotionally or physically uncomfortable.
• If mutually enjoyable, massage each other nongenitally with cocoa butter or oil.
• If nongenital touching leads to intercourse, a side-lying position with the man behind pregnant woman, may be comfortable.

For some women, the postpartum period is a difficult time for maintaining sexual relations because of emotional and physiological factors. A mother often will sexually disengage and turn her attention towards the baby. Furthermore, she often has less time, energy, and privacy for herself or her partner. She is usually "touched out" by the end of the day from all the touching with her baby, and she is physically tired. Prolactin levels are higher in nursing mothers, which may inhibit sexual desire. In addition, there is a drop in estrogen levels from the removal of the placenta, which may lessen the ability to be aroused, and healing episiotomy or cesarean delivery wounds may further inhibit sexual activity.

Menopause is the most difficult time of all to maintain sexual intimacy. There is often loss of an intimate partner due to divorce, illness (according to the Massachusetts Aging Study, 52% of men aged 40 years or more have some degree of erectile dysfunction2), or death of the partner. Physically, estrogen and testosterone levels decrease. Joffe,3 Soares,4 and Pearlstein5 have written about higher risk of depression in menopause, especially if there is a history of depression or if hot flashes persist. Depression leads to anhedonia and anergy, which often translate to diminished sexual interest.

Nonlinear sexual response
We've come a long way since Masters and Johnson in understanding a woman's sexual response cycle. Basson,6 Grazziotin,7 Whipple,8 and others have described that for most women, unlike most men, emotional intimacy is a prerequisite to sexual intimacy. Arousal, greater sexual desire, and emotional and physical satisfaction follow in a circular manner.

Besides emotional factors, physiology, psychotropic medications, and hormones may be involved in a woman's sexual response. Neurotransmitters have been studied, particularly dopamine and serotonin. Prolactin, and nitric oxide also influence sexual response.9 In addition to estrogen and testosterone, the effects of oxytocin and melanocyte-stimulating hormone are currently being investigated.10


Psychopharmacological and hormonal factors in SD
Hyperactive sexual desire disorder may be an adverse effect of treatment with a serotonin reuptake inhibitor (SRI). Serotonin (5-HT) may decrease dopamine levels, leading to increased levels of prolactin, which in turn can inhibit libido.11 SRIs that stimulate postsynaptic serotonin receptors also affect sexual function. In addition, psychotropic drugs that stimulate the 5-HT2 receptors inhibit orgasm12; and 5-HT1b, 5-HT2, and 5-HT3 stimulation appears to physiologically inhibit libido.13

It has been suggested that dopaminergic drugs may increase libido. One proposed mechanism is that D2 receptors in the pituitary inhibit prolactin production.14 Other clinical studies have shown that l-dopa may also cause an increase in libido by stimulating dopamine receptors.15 Of the serotonin receptor agonists, only those that affect 5-HT1a (eg, buspirone) may slightly enhance libido. The results of a study by Ashton and Rosen16 indicate that bupropion may be an antidote to SRI-induced SD. Agents that deplete serotonin or augment dopamine activity may have prosexual effects, especially in reversing SRI-induced anorgasmia.17 Some SSRIs, such as paroxetine, seem to have stronger inhibitory effects than others.18

It is quite difficult to determine who (other than women who have had both ovaries removed) may be testosterone deficient. It is an even greater conundrum trying to decide to what extent testosterone deficiency inhibits sexual desire in a particular woman. There is a great deal of research and controversy around the use of testosterone in restoring or enhancing sexual desire in women.

As far back as 1950, Greenblatt and colleagues19 reported the results of a double-blind study on methyltestosterone to increase libido in women. Sherwin and Gelfand20 studied women after surgical menopause was induced by removal of both ovaries. They found that women who received estrogen and testosterone had higher sex drive than those who received estrogen alone. When performing hysterectomies, gynecologists no longer routinely remove the ovaries because the ovaries may continue to produce androgen (which helps to preserve sexual interest) well into a woman's later years.21

In the United States, physicians may order, off-label, compounded testosterone cream if they think a patient has a testosterone deficiency. However, overprescribing testoster- one may lead to changes in lipid metabolism, acne, hirsutism and, rarely, liver toxicity.22

It is known that 70% to 80% of testosterone is bound to sex hormone-binding globulin. The remainder is bound primarily to albumin. Only 2% is free and unbound. Even more confounding, the measurement of free testosterone level does not necessarily reflect intracellular level, which is the true biological substrate.23SSRIs, nitric oxide, and 5-phosphodiesterase inhibitors
SSRIs may also inhibit arousal by inhibiting nitric oxide (NO) synthetase. This leads to reduced ability to relax smooth muscles, thus limiting vasocongestion. Sertraline and fluoxetine inhibit NO synthetase somewhat, but paroxetine inhibits NO synthetase more.

Several case reports suggest that the 5-phosphodiesterase inhibitors (PDE5s) such as sildenafil, tadalafil, and vardenafil may be effective in women,24 especially in restoring orgasm (although it is difficult to know how much may be placebo effect). Study results are difficult to gauge because sexual desire and arousal are multidetermined in women. To compound the complexity of studies in this area, many women are not easily "in touch" with their own arousal. MRI studies have shown that there is a "disconnect" for women-a time lapse-from the occurrence of physical arousal (vasocongestion and vaginal lubrication) to the time when a woman is consciously aware of arousal; and for some women the 2 do not correlate at all.25Pharmacological treatment strategies
There are several strategies for treating SD. For women with SD induced by an SSRI or nonserotonin reuptake inhibitor, caution must be used to maintain the therapeutic effect of the antidepressant while attempting to reduce SD. This can be accomplished by switching to an antidepressant with fewer adverse sexual effects, reducing the dosage of the SSRI or SRI, or adding another drug to enhance libido (Table). Although some of these treatments are off-label, there are anecdotal successes and theoretical rationale for using these drugs. As always, however, benefit must be balanced against risk.

Although there are pharmacological treatments and other strategies for treating women with SD, many more randomized, controlled clinical studies are needed to elucidate and find the best treatments for various kinds of SD in all stages of a woman's life.

Psychiatrists, along with gynecologists and sex therapists, are in the best position to treat women with sexual difficulties. Understanding a woman's dynamics, her history, her chemistry, and where she is in her life cycle and her relationship(s) is crucial in optimizing treatment. In the meantime, although there is no simple panacea, there are solutions we can offer our patients to minimize sexual difficulties.





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