Предменструальное дисфорическое расстройство: симптомы, причины и лечение.

Premenstrual dysphoric disorder (PMDD) is a mood disorder characterized by emotional, cognitive, and physical symptoms. PMDD causes significant distress or impairment in menstruating women during the luteal phase of the menstrual cycle. The symptoms occur in the luteal phase (between ovulation and menses), improve within a few days after the onset of menses, and are minimal or absent in the week after menses. PMDD has a profound impact on a woman’s quality of life and dramatically increases the risk of suicidal ideation and even suicide attempts. Many women of reproductive age experience discomfort or mild mood changes prior to menstruation. However, 5–8% experience severe premenstrual syndrome causing significant distress or functional impairment. Within this population of reproductive age, some will meet the criteria for PMDD. The exact cause of PMDD is currently unknown. Ovarian hormone levels during the menstrual cycle do not differ between individuals with PMDD and the general population. However, because the symptoms are only present during ovulatory cycles and resolve after menstruation, it is believed to be caused by fluctuations in gonadal sex hormones or variations in sensitivity to sex hormones. Studies have found that those with PMDD are more at risk of developing postpartum depression after pregnancy. PMDD was added to the list of depressive disorders in the Diagnostic and Statistical Manual of Mental Disorders in 2013. Roughly 20% of females have some symptoms of PMDD, but either have less than five or do not have functional impairment. First line treatment for PMDD is with selective serotonin reuptake inhibitors (SSRIs), which can be administered continuously throughout the menstrual cycle or intermittently, with treatment only during the symptomatic phase (approximately 14 days per cycle). Hormonal therapy with oral contraceptives that contain drospirenone have demonstrated efficiency in reducing PMDD symptoms as well. Cognitive behavioral therapy, whether in combination with SSRIs or alone, has shown to be effective in reducing impairment. Dietary modifications and exercise may also be helpful, but studies investigating these treatments have not demonstrated efficacy in reducing PMDD symptoms. PMDD follows a predictable, cyclic pattern. Symptoms begin in the late luteal phase of the menstrual cycle (after ovulation) and end or are markedly reduced shortly after menstruation begins. On average, the symptoms last six days but can start up to two weeks before menses, meaning symptoms can be felt for up to three weeks out of a cycle. Severe symptoms can begin and worsen until the onset of menstruation, with many not feeling relief until a few days after menstruation ends. The most intense symptoms occurring in the week and days leading up to the first day of menstrual blood flow. The symptoms usually cease shortly after the start of the menstrual period or a few days after it ends. Various symptom and severity tracking questionnaires exist to document presence and severity of symptoms throughout consecutive menstrual cycles. The current consensus on the cause of PMDD is a combination of heightened sensitivity to fluctuating levels of certain hormones (i. e. the reproductive hormones), environmental stress, and genetic predisposition. It is instead hypothesized that women with PMDD are more sensitive to normal levels of hormone fluctuations, predominantly estrogen and progesterone, which produces biochemical events in the nervous system that cause the premenstrual symptoms.

Whether or not this disorder has a specific genetic basis is still being discussed in the academic community. The possible genetic factors contributing to PMDD also have yet to be thoroughly researched. However, multiple genetic factors that contribute to the moodiness, depression, irritability, increased appetite, trouble sleeping, acne, fluid retention, headaches, nausea, and other symptoms associated with this disorder have recently been identified. Many studies have noted that a polymorphism of the brain derived neurotrophic factor gene (BDNF), a gene that helps support neurons in their function and survival in the brain by creating a protein that helps in the growth, maturation, and maintenance of these cells, may play a role in causing PMDD symptoms. This is because the result of this polymorphism mimics the hallmarks of PMDD: volatile moods, depression and irritability centered around the menstrual cycle. This gene has been studied extensively in its association with depression and, promisingly for PMDD research, mice homozygous for the BDNF polymorphism exhibited anxiety like traits that fluctuated and changed around the mice's estrus, analogous to the human's menstruation, therefore mimicking some of the symptoms of PMDD.

Environmental stressors have also been found to prospectively increase risk for PMDD symptoms. Environmental components such as stress, hormonal fluctuation, and epigenetics play a key role in the pathology and onset of the disorder. But the most common pre existing disorder found in those diagnosed with PMDD is major depression, wherein they either actually had it or were misdiagnosed when they should have only been diagnosed with PMDD.

Women with PMDD usually see their symptoms disappear while they are pregnant. Premenstrual dysphoric disorder is primarily a mood disorder that is associated with onset of menstruation; pregnancy, menopause, and hysterectomies all cause menstruation to cease, thereby stopping the proposed sex steroid /serotonin caused symptoms from occurring. Although one might expect a higher rate of postpartum depression among those with PMDD, a large study of women with prospectively confirmed PMDD did not find a higher prevalence of postpartum depression than in controls.

The lifetime incidence of other psychiatric disorders is high among women with PMDD. An older review article (2002) utilizing the previous edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM IV) used studies from 1966 to 2002 on PMS and mental health disorders and selected for patients who retrospectively met the diagnostic criteria for PMDD and found that Major Depressive Disorder, Seasonal affective disorder, and generalized anxiety disorder often co occur in PMDD. Another systematic review study suggests that patients with bipolar disorder, type I or II, have a higher incidence of PMDD. While the diagnosis of PMDD requires a mental health provider to determine that the symptoms a woman is facing is not due to an underlying mental or physical health condition, it is important to note that other conditions often co occur and impact the quality of life and treatment plan for people with PMDD.

Previous links to suicidality and PMS have been made, but women with PMDD are more likely still to consider and attempt suicide even when controlling for mental health comorbidities. Despite the increase in suicidal ideation and attempts in this population, the data currently suggests that suicidal ideation or action is not more likely to occur during the late luteal phase when PMDD symptoms would occur. It is difficult to study whether treatment reduces suicidality because of the multifaceted reasons provided for suicidal ideation. However, treatment has been well documented to reduce physical and emotional symptoms of PMDD.

Other organizations that have published diagnostic criteria for PMDD include the Royal College of Obstetricians and Gynecologists and the International Society for the Study of Premenstrual Disorders (ISPMD). The ISPMD was a consensus group established by an international multidisciplinary group of experts. The group's diagnostic criteria for PMDD focuses on the cyclic nature of the symptoms occurring during the luteal phase of the menstrual cycle, as well as the symptoms being absent after menstruation and before ovulation and causing significant impairment. The ISPMD diagnostic criteria for PMDD do not specify symptom characteristics or number of symptoms. Menopausal transition – affective symptoms associated with the menopausal transition most commonly start when menstrual cycle starts to become irregular or anovulatory whereas PMDD symptoms occur during the luteal phase of ovulatory cycles. Thyroid disorders—patients with both hyperthyroidism and hypothyroidism may present with affective symptoms. The patient's history is very important to determine whether the provider should suspect thyroid disorders. Patients should also have thyroid hormone levels checked to ensure no underlying thyroid disorder is present.

Several medications have been shown to effectively reduce the physical and emotional symptoms of PMDD.

Selective serotonin reuptake inhibitors (SSRIs) are the first line medication. Women taking SSRIs to ease PMDD generally report >50% alleviation in symptoms, which was significant improvement compared to placebo. Two approaches to dosing have been studied: continuous dosing (daily) and luteal dosing (14 days before menstruation and discontinuing at the onset of menses). Both dosing schedules have similar effectiveness with some recent studies demonstrating greater symptom control with continuous dosing.

Other proposed treatments include dietary modification, herbal remedies including St John's Wort and chasteberry, acupuncture, and exercise. A review article claimed significant improvement of PMS symptoms with herbal treatments and acupuncture but the studies selected for review did not stratify severity of symptoms. Finally, the American College of Obstetricians and Gynecologists recommends regular aerobic exercise to reduce PMS symptoms.