Clinical epidemiology of premenstrual disorder: informing optimized patient outcomes
Authors Robinson L, Ismail K
Received 1 January 2015
Accepted for publication 25 March 2015
Published 25 September 2015 Volume 2015:7 Pages 811—818
Checked for plagiarism Yes
Review by Single anonymous peer review
Peer reviewer comments 2
Editor who approved publication: Professor Elie Al-Chaer
Lynne LL Robinson,1 Khaled MK Ismail1,2
1Department of Obstetrics and Gynaecology, Birmingham Women’s Hospital, Birmingham, UK; 2Birmingham Centre for Women’s and Children’s Health, School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
Abstract: Premenstrual disorders encompass a spectrum that ranges from mild cyclical psychological and somatic symptoms to the rarer but much-more-severe premenstrual dysphoric disorder. This condition is serious and the etiology is unclear, but possible causes include genetic factors, hormonal fluctuations, and neurotransmitter dysfunctions. Differentiation from other affective disorders can be difficult but is key to providing appropriate management. This comprehensive review will discuss the most-recent classification of premenstrual disorders, etiology, diagnosis, and potential current management strategies.
Keywords: premenstrual dysphoric disorder, progesterone, oestrogen, oophrectomy, GNRH analogues
The syndrome of premenstrual tension was first described in the 1930s.1 Since then there have been various terminologies for a collection of psychological and physical symptoms, which occur in the luteal phase of the menstrual cycle and are relieved by menstruation. Approximately, 50%–80% of women will experience some premenstrual symptoms that may vary from mild to severe,2 but the prevalence of the severe form of psychological symptoms, known as premenstrual dysphoric disorder (PMDD), ranges from 3%–9%.2–6 There have been various terminologies used to describe the syndrome over the years, which include premenstrual syndrome (PMS), premenstrual disorder (PMD), and late luteal-phase dysphoric disorder (American Psychiatric Association 1987), and finally PMDD (American Psychiatric Association 1994). To address the difficulty in diagnosis, the Consensus Group of the International Society for Premenstrual Disorders7 has published definitions and diagnostic criteria for a group of interlinked disorders that are now termed PMDs, and the previously known PMS is now termed core PMD (Table 1).8,9 The classification has several advantages compared to its predecessors, mainly because it accounts for different clinical scenarios without losing the essential criteria for diagnosis. Moreover, it is useful to tailor management based on the patient’s clinical categorization.
Table 1 The classification of premenstrual disorders
The key component of the core PMD is ovulation, and the symptoms must appear during the luteal phase and resolve by the end of menstruation. There should be a symptom-free period of time in the follicular phase before the symptoms commence again. A critical factor is the impact the premenstrual symptoms have on the patients’ lifestyle. The variations in core PMD symptoms are outlined in Table 1.
Symptoms associated with PMDs can vary from being somatic, psychological, or a mixture of both.11 PMDD represents a type of PMD in which the psychological symptoms are severe. In view of the implications of such a diagnosis on management strategies and the serious consequences of delayed diagnosis or substandard management, there are strict criteria for its diagnosis that aim to differentiate it from other types of core PMD. These criteria were set by the American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorders, fourth Edition (DSM-IV) where the diagnosis requires five out of eleven specified symptoms (Table 2).
Table 2 Summary of DSM-IV criteria for PMDD
Premenstrual disorders: etiology
The etiology of PMD is unclear. There is some evidence for a genetic link, as demonstrated in a study comparing PMD in monozygotic and dizygotic twins.12 The most postulated theories for the culprits underlying PMD are estrogen and progesterone. It has been thought that estrogen or progesterone deficiency may exacerbate PMD symptoms.1 Indeed, treatment of PMD with progesterone suppositories was at one point a popular treatment.13 However, the converse is now considered to be the case, as evidence synthesized from randomized trials has not shown the efficacy of this treatment.14 Interestingly, core PMD symptoms are absent during pregnancy, a time when there are extremely high levels of endogenous progesterone and estrogen. It seems, however, unlikely that women affected by PMD have different levels of endogenous hormones than do unaffected women. In fact, measurement of progesterone levels has not shown any significant difference between women with core PMD versus control groups.15 They may, however, be more sensitive to fluctuations in these hormones levels.16–18 Women with PMD tend to develop negative mood and somatic symptoms with normal levels of endogenous hormones. It was reported that when pituitary downregulation is achieved and add-back hormone replacement given, PMS symptoms can be reintroduced.18 Nevertheless, the relationship between progesterone and PMS symptoms is not clear cut, as there is a lack of reduction in somatic and psychological symptoms with the use of mifepristone, a progesterone antagonist.19 Hence, the interaction between progesterone and PMS symptoms is probably not mediated through the classic progesterone receptor, but the relationship with progesterone must be more complex.
Estrogen appears to have marked effects on central nervous system activity, and these appear mainly to be mood enhancing. It is thought to selectively increase cerebral blood flow, provide neuroprotection, and have differential effects on neurotransmitters. Estrogen acts as a cholinergic agonist in selective brain regions and decreases dopamine D2 receptor sensitivity and possibly other dopaminergic receptors.
The estrogen effects on endorphins vary, but it can increase overall endorphic activity.20 Its influence is not limited to monoamines, as it upregulates γ-aminobutyric acid (GABA), which is an important regulator of stress, anxiety, and alertness.
Neurotransmitters and neurosteroids
The neuroactive metabolites of progesterone are also known to affect mood and behavior, an effect that is mediated through GABA. These include 3-alpha-hydroxy-5-alpha-pregnane-20-one (allopregnanolone or ALLO) and 3-alpha-hydroxy-5-beta-pregnane-20-one (pregnanolone). These metabolites act as agonists of the GABA-A neurotransmitter. The neurosteroid ALLO is a GABA-A receptor-positive modulator and enhances the effect of GABA on the receptor. A deficiency of these metabolites has been associated with PMS-type symptoms,21 and acute treatment with substances such as ALLO has demonstrated anxiolytic effects. However, chronic exposure of progesterone metabolites to the GABA-A receptor can produce increased anxiety and depressive symptoms.22
Serotonin release is linked to variations in mood, libido, and appetite. A deficiency of serotonin can lead to depressive and anxiolytic like symptoms. Sex steroids have been postulated to modulate serotonin release, and estrogen enhances monoamine activity and increases serotonergic postsynaptic responsivity. Serotonin function is also altered in the luteal phase of the cycle, as demonstrated by decreased platelet uptake of serotonin23 and decreased baseline whole-blood serotonin.24
Estrogen appears to have a role in degradation of monoamine oxidase and catechol-o-methyl-transferase, resulting in an enhanced serotonin action and improved performance of selective serotonin reuptake inhibitors (SSRIs). Conversely, progesterone has the opposite effect of increasing monoamine oxidase and catechol-o-methyl-transferase activity, therefore decreases serotonin availability, which may result in depressive symptoms.
Neuroimaging studies have demonstrated some differences in cerebral blood flow with ovarian suppression, which can be normalized with estrogen and progesterone replacement.25
Women with PMDD also show an increase in cerebellar activity from the follicular phase to the late luteal phase that correlates with worsening of mood.26 The cerebellum is rich in GABA-A receptors, and some animal studies suggest that women with PMD may have disordered regulation of GABA receptors. The increased cerebellar activity could reflect decreased GABA-mediated inhibition during the luteal phase of the cycle. There also appear to be increased cortical GABA concentrations in the luteal phase of women with PMDD when compared with healthy subjects, who show decreased cortical GABA.27 This abnormal GABA-A receptor functioning could imply there is increased resistance to GABA agonists, such as pregnane metabolites, which may mediate mood changes in the luteal phase.
Interestingly, some work has been done to investigate the provocation of negative emotion and how it is handled by women with PMDD. In one study, the neural response to negative emotion was measured using magnetic resonance imaging.28 Researchers found that women with PMDD were less able than controls to inhibit incorrect responses to affectively negative words. Also, PMDD sufferers appeared to have less impulse control than did control subjects, due to modulation of the limbic system.28
These findings suggest that neurocircuitry in PMDD sufferers may be affected by hormonal fluctuations and disordered control of GABA receptors, and also that these patients may have a very different response to processing negative thoughts than do controls.
Endogenous opioids include endorphins, enkephalins, and dynorphins. Various opioids bind selectively to different opioid receptors in the brain, producing specific effects on mood. In particular, high levels of β endorphins have been identified in the portal system of the hypothalamus, and it is thought that they probably decrease pituitary secretion of gonadotrophins by exerting an effect on hypothalamic gonadotropin-releasing hormone (GnRH) secretion.
β endorphin levels have been demonstrated to be lower in the luteal phase of the cycle in women suffering from PMS.29,30 In addition, women suffering from PMS appear to have a blunted enhancement in the level of β endorphins midcycle compared to control women. This low level of endorphins is linked with lethargy, low mood, and emotional instability, all of which are symptoms typical of PMS sufferers.
Diagnosis of PMD
The Consensus Group of the International Society for Premenstrual Disorders has categorized PMD into “core” and “variant” types.10 The pathophysiology behind PMD is linked with the presence of ovulation, as mentioned earlier. The exact mechanism for PMD is unclear, but the symptoms appear to be caused by the luteal phase of the menstrual cycle and therefore are most likely progesterone related. PMD like symptoms can also be caused by the use of exogenous progestogens. The key features are somatic and psychological symptoms, which occur exclusively within the luteal phase of the menstrual cycle and are relieved by menstruation. There must be a window of time between the end of ovulation and menstruation that is symptom free. These symptoms do not have to occur in every cycle but should occur in at least two out of three cycles. The impact these symptoms have on the patient’s quality of life is key to the diagnosis and management of the patient.
Prospective symptom rating over several cycles is the gold standard for diagnosis; however, if this is not feasible, at least a symptomatology chart should be completed to accurately aid the diagnosis and exclude other pathologies such as affective disorders (Table 3). If the premenstrual symptoms are due to exacerbation of an underlying disorder, then the existing disorder should be managed appropriately or ovarian suppression should be used.
Table 3 The premenstrual symptoms screening tool
The diagnosis of PMD without menstruation involves identifying when ovulation occurs. This can be identified using ovulation kits or progesterone measurements, and the timing of ovulation is then related to the peak symptoms.
PMD appears to be inextricably linked with fluctuations in hormone levels and in particular with progesterone. Therefore, one of the most common approaches to treating PMD is to try ovulation suppression. The various methods of doing this are: combined oral contraceptive pill (COCP), GnRH analogues, and bilateral oophorectomy. Other approaches include antidepressants and the use of vitamin and mineral supplements and alternative therapies.
Combined oral contraceptive pill
The COCP has not shown dramatic results in randomized clinical trials with regard to its effect on PMD symptoms. This may be due to the action of progesterone within the preparation and also fluctuations in hormone levels inflicted by a 21/7 day regime. In randomized studies, monophasic and triphasic COCPs seem to improve mood and physical symptoms, but the monophasics have a marginally more-beneficial effect than triphasic pills, presumably due to the reduction in hormone fluctuations.32 However, as there was no placebo-controlled group, a placebo effect could not be excluded.
It is best to avoid COCPs containing 19-nortestosterone-derived progestogens, as these can contribute to symptoms such as water retention, bloating, weight gain, and breast tenderness. A shorter pill-free window (24/4 days), lower doses of estrogen and progestogens, such as drosperinone, which has antimineralocorticoid and antiandrogenic properties, may be better options for women with PMDD and may improve symptom control.33,34 However, the effects of contraceptives containing drosperinone on PMDD symptoms have not been evaluated over more than three cycles.35
GnRH analogues initially increase the release of follicle-stimulating hormone and luteinizing hormone from the anterior pituitary gland but then rapidly downregulate their release, causing pituitary suppression and anovulation. For most women with true PMDD or PMS, this suppression should relieve symptoms and act as a very effective test to differentiate between women with PMDD and a primarily affective disorder. However, long-term suppression of ovarian function leads to menopausal symptoms and more seriously to osteoporosis and cardiovascular disease. Therefore, add-back hormone replacement therapy (HRT) is required and estrogen-only HRT can be given with good effect without necessarily introducing PMS symptoms. Nonetheless, unopposed estrogen carries the risk of endometrial hyperplasia and carcinoma, and therefore progesterone must be added for endometrial protection. It is the progesterone component of add-back HRT that can be most troublesome with regard to PMS symptoms, and preferable options to limit this would include the Mirena intrauterine system (IUS) or tibolone, a synthetic anabolic steroid. A meta-analysis has shown that tibolone is less likely than conventional estrogen and progesterone to reintroduce PMS symptoms.36
Traditionally, progestogens have been used to treat PMS symptoms as it was thought that the condition was caused by progesterone deficiency. However, treatment has been found to be ineffective and can actually make symptoms worse or reinstate symptoms after ovarian suppression.37 This is due to the fact that progesterone metabolites can act via the GABA-A receptor.
Therefore, currently progesterone is not recommended as a treatment for PMD and should be avoided where possible and if required options such as drosperinone or the Mirena® IUS should be considered.35
The Mirena® IUS may be used as a treatment for PMS symptoms on its own, but is only useful for this if it suppresses ovulation, which only occurs in 30%–40% of users. Patients may find that some PMS symptoms recur within the first few months after insertion of the Mirena® IUS, but this should improve with time as systemic absorption of the levonogestrel decreases.
Estradiol can be used in high doses (eg, 200 μg patch) to suppress ovulation and therefore is effective in preventing PMD.38 Studies have shown that transdermal estrogens seem to be more effective and preferable because of the avoidance of first-pass metabolism and production of hepatic coagulation factors. In addition, oral estrogens cause more fluctuations in hormone levels, and higher doses of estrogen are required to achieve an effect. They also have a less-desirable biological effect by increasing levels of angiotensinogen, cortisol-binding globulin, thyroxine-binding globulin, sex-hormone–binding globulin, and triglyceride levels. The estrone-to-estradiol ratio is also increased, and this is especially notable with conjugated equine estrogens.
Studies on mood in postmenopausal women show good effect from transdermal preparations39 compared to negative findings with oral preparations of conjugated equine estrogens,40 but there are no studies on women with PMD and oral estrogen. Transdermal estrogen can be administered in the form of a high-dose patch (100–200 μg ),41 gel, or implant. Patches and implants have been demonstrated to be superior to placebo and although studies have not been carried out on gels, they are often used and are likely to be as effective as patches and are often less irritating to the skin. Estrogen gel should be used in doses of 1–3 g per day (equivalent to a 200 μg patch twice weekly).
Implants have been shown to be very effective but are less useful in younger women of reproductive age due to the need for endometrial protection with progesterone for up to 2 years after discontinuation of the implant. Unopposed estrogen carries the risk of endometrial hyperplasia, and therefore progesterone must be added to protect the endometrium. As mentioned previously, the most effective way of doing this without reintroducing symptoms would be to insert a Mirena® IUS. The Mirena can cause systemic progestogenic symptoms, but these are mostly transient and resolve within a few months of use. Alternatively, oral progesterone can be used in a low-dose short course such as norethisterone 2.5 mg daily or utrogestan 200 mg daily for 7 days per month.
Although these high doses of estrogen almost certainly suppress ovulation, women must be informed that these regimens are not contraceptive (unless Mirena® IUS is used) and additional precautions must be used.
A novel method of avoiding the progestogen-induced symptoms may be the advent of a new combination product, which combines a conjugated estrogen with the selective estrogen receptor modulator bazedoxifene. This product may prove useful in women with progestogen intolerance, as it avoids the addition of progesterone whilst providing endometrial protection.42 However, this product is not yet available in the UK.
Selective serotonin reuptake inhibitors
SSRIs are commonly used as a treatment for PMD. ALLO is a neuroactive steroid derived from progesterone that modulates the GABA receptor, and SSRIs may augment the action of ALLO or possibly work by increasing serotonergic activity. Meta-analyses have shown up to 60% improvement in symptom relief with the use of SSRIs and serotonin–norepinephrine reuptake inhibitors.43–45 The most useful drugs appear to be fluoxetine, sertraline, paroxetine, and escitalopram,46,47 along with the serotonin–norepinephrine reuptake inhibitor venlafaxine, and these are effective either used continuously or only in the luteal phase of the cycle.48 Other anxiolytics and antidepressants that act only on augmenting noradrenergic activity do not appear to significantly improve symptoms associated with PMD.49–51 SSRIs act better on affective rather than somatic symptoms and therefore may be preferable if mood symptoms are dominant.
The overall response to SSRIs in clinical trials ranges from 50%–90%. There are some side effects, which are commonly nausea, insomnia, fatigue, headache, bowel upset, and decreased libido. These are usually transient but if troublesome, as sexual function returns rapidly on discontinuation of the treatment, then luteal-phase treatment may be preferable for those patients as they will only have side effects for 2 weeks of the cycle. If luteal-phase treatment is to be used, the SSRI is commenced 14 days before the expected onset of menstruation and stopped on day 1 of the cycle.
Other antidepressants such as tricyclics do not seem to have the same beneficial effect on PMS sufferers as SSRIs do and have been shown to be no better than placebo.50,51 This is likely due to the fact that PMS is associated with serotonergic activity.
Laparoscopic bilateral salpingo-oophorectomy is an extreme measure to treat PMD, but it is effective and is used in severe cases.52 The cessation of ovulation provides relief of symptoms, but first a trial of a GnRH analogue is advisable to help assess if the patient is suffering from true PMD or from an affective disorder. Once the diagnosis is made, caution has to be given to the age of the patient, as fertility will be removed and HRT will be required until at least the age of 50 years. Consideration should be given to performing a hysterectomy at the same time, as this would allow for estrogen-only HRT. The addition of progesterone to HRT to protect the endometrium can reintroduce symptoms, and if the uterus is to be retained, the Mirena® IUS is the preferable choice for endometrial protection. However, levonogestrel from the IUS can be absorbed, also leading to side effects, therefore a hysterectomy is likely to lead to a better outcome longterm unless there are excessive individual surgical risks. The other advantage of removing the uterus at the time of bilateral salpingo-oophorectomy is that there is some evidence to suggest that estrogen-only HRT confers a lower risk of breast cancer than combined HRT in postmenopausal women, which has implications for women later in life.53
Calcium has been used as a therapy for PMS. Estrogen plays a role in calcium metabolism regulation and vitamin D metabolism. Calcium levels therefore fluctuate throughout the menstrual cycle, and women who are hypocalcemic may be more likely to have an affective disorder such as PMD.
There is only weak evidence that vitamin B6 may have any benefit over placebo.54,55 Caution should be employed regarding increasing the dose of vitamin B6 if there is little or no effect, as there is a risk of peripheral neuropathy. The treatment should certainly be discontinued if there are any symptoms of numbness or tingling in hands or feet. Other treatments that have been used are magnesium, vitamin E, soy isoflavones, and evening primrose oil, but there is limited evidence for any of these.55
PMD can be a very distressing disorder and its variants also cause a great deal of disruption to quality of life. The pathogenesis involves ovulation, and for diagnosis the history must include either physical or psychological symptoms that occur in the luteal phase of the cycle and must be relieved during menstruation. A symptomatology chart covering at least 2 months should be used to aid an accurate diagnosis. If there is no symptom-free week following menstruation, then a psychiatric or physical condition is more likely and an alternative management strategy is required. If the PMS symptoms are mild and not disruptive to the patient’s quality of life, then all that is required is reassurance and support.
Once a diagnosis of a core PMD is made, the main mode of treatment is to prevent ovulation. This decision is made in conjunction with patients’ fertility and contraceptive needs. Inhibition of ovulation can be achieved using the COCP, estradiol, or GnRH analogues, and in some cases the Mirena® IUS may be helpful. Other approaches involve enhancing serotonin activity using SSRIs or alternative therapies, which may have limited benefit. The condition can be so disruptive and severe that bilateral salpingo-oophorectomy is required, but the HRT that is then necessary can cause symptoms to resume if it contains progesterone. For this reason hysterectomy is often considered as it allows for estrogen-only HRT. Surgery is a last resort and should only be considered after extensive counseling, and there must be a trial period with GnRH analogues before the decision is made.
The authors report no conflicts of interest in this work.
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