Efficacy and safety of topical alprostadil cream for the treatment of female sexual arousal disorder (FSAD): a double-blind, multicenter, randomized, and placebo-controlled clinical trial

Instruments for Screening, Diagnosis, and Management of Patients with Generalized Acquired Hypoactive Sexual Desire Disorder

Screening, diagnosis, and management of hypoactive sexual desire disorder (HSDD) and research into the condition have been challenging due to its biopsychosocial complexity and lack of consensus on relevant measures. Although physician interviews yield much clinically valid information, self-reported questionnaires appear more acceptable to patients and physicians. Consequently, validated patient-reported outcome (PRO) tools are essential for evaluation and management of HSDD, including any therapeutic intervention. The US Food and Drug Administration (FDA) has issued guidance on the use of appropriate endpoints and associated measures for female sexual dysfunction, including HSDD. Although many of the available measures were not designed specifically for HSDD assessment, as per FDA guidelines, most clinical studies have used individual domains or items from established tools, such as the Female Sexual Function Index-desire domain and Item 13 of the revised Female Sexual Distress Scale. For clinical practice, several professional societies recommend the Decreased Sexual Desire Screener and/or a sexual history as tools to diagnose HSDD. This review discusses frequently used PRO tools as well as the newly developed and validated Elements of Desire Questionnaire, which may be appropriate for clinical trials or clinical practice.

Sexual Function after Surgery for Prostate or Bladder Cancer

Background

Compromised sexual function is often a side effect for patients following radical surgical procedures for bladder or prostate cancer.

Methods

The authors review the classification and physiology of sexual function and dysfunction. Moreover, they explain the possible pathophysiology directly resulting from surgery, and they discuss several approaches available to address these problems.

Results

Options for male sexual dysfunction, primarily erectile dysfunction resulting from radical prostatectomy or surgery for bladder cancer, range from patient education to penile prosthesis implantation. Female sexual dysfunction caused by surgical intervention for bladder cancer includes problems with libido, arousal, orgasm, and dyspareunia. Treatment options for women can include sex therapy, hormonal therapy, and preventive strategies. However, no consensus has been established on the most effective agents and time points to treat male or female sexual dysfunction following radical cystectomies or prostatectomies. The chronic intermittent treatment of erectile dysfunction following radical prostatectomy has been commonly referred to as penile rehabilitation.

Conclusions

Additional research is needed to obtain further data concerning sexual dysfunction in both men and women following radical pelvic surgeries. Modification of surgical techniques, the use of various treatment modalities for sexual dysfunction, and the development of new agents will help to successfully minimize or prevent damage and restore normal sexual function after local surgical therapy for prostate or bladder cancer in the future.

Topical Alprostadil Treatment of Female Sexual Arousal Disorder

Objective:

TO review the pharmacology, pharmacokinetics, efficacy, and safety of topical alprostadil in the treatment of female sexual arousal disorder (FSAD).

Data Sources:

A literature search was conducted using MEDLINE (1966–May 2006), EMBASE, and International Pharmaceutical Abstracts with the search terms alprostadil, female, and sexual dysfunction/drug therapy.

Study Selection and Data Extraction:

All published and unpublished clinical trials and abstracts involving the efficacy and safety of topical alprostadil use in women were reviewed. Data on file with the manufacturer were also included.

Data Synthesis:

Topical alprostadil is a vasodilatory agent under development for the treatment of FSAD. In-clinic application of alprostadil increases genital vasocongestion, vaginal erythema, transudates, and some patient-assessed indices of sexual arousal; however, these effects have not been consistently superior to placebo. Three of 4 trials investigating at-home use of topical alprostadil have demonstrated improvements in achievement of satisfactory levels of sexual arousal and successful sexual encounters in patients with FSAD. Adverse events appear to be mild and localized and consist of burning and itching at the application site.

Conclusions:

Two formulations of topical alprostadil are in Phase II clinical trials for the treatment of FSAD. Initial results of clinical trials have demonstrated some beneficial effects on arousal success rates and other subjective measures of sexual arousal; however, these results have been inconsistent and not reproducible in all trials. The results of ongoing clinical studies are needed to further define the role of topical alprostadil in the treatment of FSAD.

Topical Alprostadil for the Treatment of Female Sexual Arousal Disorder

Female sexual dysfunction is a common disorder that is present in over 40% of women in the USA. An evaluation of female sexual dysfunction differs greatly from male erectile dysfunction in that female sexual dysfunction is a very general term that encompasses a variety of sexual complaints in women, rather than a specific physiological disorder. No pharmacological treatment is presently approved for the treatment of the myriad of disorders that are involved in female sexual dysfunction. One of the more common disorders of female sexual dysfunction involves disturbances in objective or subjective sexual arousal. Sexual arousal in women has a central component and a peripheral, or vulvar, component. Disorders in vulvar blood flow and stimulation may lead to decreased genital and central arousal. A logical corollary of this statement is that an improvement in local blood flow by the use of a local or systemic vasodilator may lead to an increase in overall sexual arousal and an increase in sexual satisfaction. This article will explore the use of topical alprostadil as a local vasodilator to improve sexual arousal and sexual satisfaction in women with female sexual arousal disorder.

Peripheral Female Genital Arousal as Assessed by Thermography Following Topical Genital Application of Alprostadil vs Placebo Arousal Gel: A Proof-of-Principle Study Without Visual Sexual Stimulation

Introduction

Female sexual arousal disorder is a pathophysiologic state characterized clinically by persistent or recurrent inability to attain or maintain an adequate lubrication-swelling response of sexual excitement until completion of sexual activity. Prior clinical experience with alprostadil products for men with erectile dysfunction supports its use in women with female sexual arousal disorder.

Aim

To compare the effect of topical alprostadil with over-the-counter (OTC) lubricant on female genital arousal in the absence of visual sexual stimuli.

Methods

Healthy premenopausal women without sexual dysfunction were recruited from the community to participate in the study. Of 17 women who consented, 10 were enrolled and completed the trial. The mean age of subjects was 32 years (range = 27–43). Study drug or placebo was applied topically to the genitals. Continuous temperature monitoring was performed. Participants completed questionnaires assessing genital sensation, effect, intensity, and duration.

Main Outcome Measures

Change in temperature from baseline in vestibule, clitoris and vulva.

Results

In all 10 subjects, topical alprostadil induced a statistically significant increase in temperature of the vestibule, clitoris, and vulva compared with the OTC lubricant. The most rapid difference in genital temperature between placebo and alprostadil was seen on the vulva, which demonstrated a significant difference at approximately 9 minutes. There was a significant difference in temperature seen for the vestibule and clitoris at 11 and 19 minutes, respectively. Sixty percent of women reported being aware or conscious of genital sensations with topical alprostadil, but not with OTC lubricant. Discordance was noted in 30% of subjects who reported being aware or conscious of genital sensations with the two treatments and 10% who reported not being aware or conscious of genital sensations with either treatment.

Conclusion

Topical alprostadil administered to healthy premenopausal women induced statistically significant, sustained increases in genital temperatures of the vestibule, clitoris, and vulva within 20 minutes compared with OTC lubricant.

Disentangling desire and arousal: a classificatory conundrum

A controversial proposal to collapse sexual disorders of desire and arousal is forthcoming in the diagnostic and statistical manual of mental disorders (5th ed.) (DSM-5). Yet, no study has attempted to empirically distinguish these disorders by using explicit criteria to recruit and compare distinct groups of low desire and arousal sufferers. The goal of the current study was to test the feasibility of finding medically healthy men and women meeting clearly operationalized DSM-IV-TR criteria for disorders of desire and/or arousal and compare them to matched controls. To assess operational criteria, participants completed a comprehensive telephone screening interview assessing DSM-IV-TR and DSM-5 criteria, as well as standardized self-report measures of sexual functioning. The use of operationalized DSM-IV-TR criteria to recruit participants led to the exclusion of over 75% of those reporting sexual difficulties, with the primary reason for exclusion being failure to meet at least one central diagnostic criterion. The application of the DSM-5 criteria was even more restrictive and led to the exclusion of all but four men and one woman using the original four-symptom criteria, and four men and five women using the revised three-symptom criteria. Cluster analyses supported the distinction between desire and genital arousal difficulties, and suggest that different groups with distinct clusters of symptoms may exist, two of which are consistent with the DSM-5 criteria. Overall, results highlight the need for revisions to the diagnostic criteria, which, as they stand, do not capture the full range of many people's sexual difficulties.

Differentiating components of sexual well-being in women: are sexual satisfaction and sexual distress independent constructs?

INTRODUCTION

Sexual satisfaction and sexual distress are common outcome measures in studies of sexual health and well-being. However, confusion remains as to if and how the two constructs are related. While many researchers have conceptualized satisfaction and distress as polar opposites, with a lack of satisfaction indicating high distress and vice versa, there is a growing movement to view satisfaction and distress as relatively independent factors and measure them accordingly.

AIM

The study aimed to assess the level of independence between sexual satisfaction and distress in female clinical and nonclinical samples.

METHODS

Ninety-nine women (mean age = 25.3) undergoing treatment (traditional sex therapy and/or gingko biloba) for sexual arousal disorder with or without coexistent hypoactive sexual desire disorder and/or orgasmic disorder completed surveys assessing sexual satisfaction, sexual distress, sexual functioning, and relational functioning at pretreatment, mid-treatment, posttreatment, and follow-up. Two hundred twenty sexually healthy women (mean age = 20.25) completed similar surveys at 1-month intervals.

MAIN OUTCOME MEASURES

Sexually dysfunctional women completed the Sexual Satisfaction Scale for Women (SSS-W), the Female Sexual Function Index (FSFI), and the Dyadic Adjustment Scale. Sexually healthy women completed the SSS-W, the FSFI, the Relationship Assessment Scale, and the Dimensions of Relationship Quality Scale.

RESULTS

Sexual satisfaction and distress were generally closely and inversely related; however, distress was more closely related to sexual functioning variables than was satisfaction in the clinical sample, and satisfaction was more closely related to relational variables than was distress in the nonclinical sample. Additionally, satisfaction and distress showed partially independent patterns of change over time, and scales of distress showed a larger change in response to treatment than did scales of satisfaction.

CONCLUSION

Although sexual satisfaction and distress may be closely related, these findings suggest that they are, at least, partially independent constructs. Implications for research on sexual well-being and treatment outcome studies are discussed.

Lower urinary tract disease: what are we trying to treat and in whom?

The diseases of the lower urinary tract are traditionally divided into abnormalities of storage and abnormalities of emptying. The targets for therapy were the organs most responsible for influencing storage and emptying. Modern understanding places the symptomatic status of the patient as the overriding criterion for treatment. It also accommodates a broader understanding of multiple and overlapping systems. Symptoms of voiding dysfunction have been clearly shown to be associated with symptoms of other genitourinary disease, for example, erectile dysfunction (ED). Treatment of voiding dysfunction has also been shown to have effects (adverse or beneficial) in these other domains. Thus, the symptoms of lower urinary tract disease (LUTD) that have to be considered now as targets relevant to these therapies include ED, ejaculatory dysfunction, sexual desire, sexual pain disorders and female sexual dysfunction. The anatomic, neural and endocrine systems that support these symptomatic functions and dysfunctions span the range from the urogenital smooth muscle to the hypothalamus, the bladder sensory output to the micturition centre and growth factors to androgens. Potentially important targets also include vascular and spinal structures, sex hormones and nitric oxide as well as the obvious genes, enzymes and receptors. The epidemiological studies prove the convergence of LUTD when viewed through the lens of the current patient-related outcomes and problem constructs. This convergence serves as a clear guidance to include wide ranging outcome instruments in all future studies with compounds being investigated for the treatment of LUTD. Out of these will come evidence of expected and unexpected collateral effects. The convergence should open the possibility to a different business model for developing therapeutic concepts. The blockbuster drug for a monolithic indication may be supplemented by agents with single or multiple pathway activity with smaller parallel targets. Using an approach based on patient reported outcomes to therapeutic targets not only widens the range of conditions, but also the patient types who can be considered as having LUTD.

Potential future options in the pharmacotherapy of female sexual dysfunction

Female sexual dysfunction (FSD) is considered a common medical problem estimated to affect millions of women in the westernized countries. FSD has been classified into four different categories including sexual arousal disorder (FSAD), sexual desire disorder (HSDD), orgasmic disorder and sexual pain disorder. The focus of this article is the potential role of pharmacological compounds currently under development, in the treatment of sexual arousal and orgasmic disorders in order to enhance the sexual response in adult females. While a number of potential therapeutic options are available to date, not one of the pharmacological treatment regimens has been yet considered the Gold standard in the management of symptoms of FSD. This article reviews the rationale and potential benefits of using distinct drug formulations in the treatment of FSD.

Neurovascular preservation in orthotopic cystectomy: Impact on female sexual function

OBJECTIVES

The published data regarding female orthotopic cystectomy have focused primarily on urethral recurrence and urinary continence. In a new era of sexuality, evaluating postoperative sexual outcome has become a new surgical endpoint. In this study, we focused on the impact of neurovascular preservation after radical cystectomy and neobladder construction.

METHODS

We assessed female sexuality in 13 patients after orthotopic cystectomy using a standardized questionnaire, Female Sexual Function Index (FSFI). Six patients had undergone nerve-sparing cystectomy and seven had undergone contemporary non-nerve-sparing cystectomy. Intraoperatively, the tumor was deemed oncologically safe for neurovascular preservation. All 13 patients were sexually active preoperatively, were younger than 65 years old, had recurrence-free follow-up findings after 1 year, and had undergone no pelvic irradiation. The 19-item FSFI questionnaire analyzed six domains (desire, arousal, lubrication, orgasm, satisfaction, and pain) of sexual function.

RESULTS

In the nerve-sparing group (mean age 55.9 years), the baseline and 12-month postoperative scores showed a minimal decline in results, with a total mean FSFI score of 24.5 versus 22.3, respectively. In analyzing each of the six domains, no significant decline or difference was observed. Conversely, in the non-nerve-sparing group (mean age 56.7 years), a significant decline or difference was found in the 12-month total mean FSFI scores between the baseline and postoperative FSFI scores (25.0 versus 11.0, respectively). In the non-nerve-sparing group, 6 of 7 patients ultimately discontinued sexual intercourse.

CONCLUSIONS

Female sexual function was preserved in patients who received neurovascular preservation. In contrast, all domains of sexual function declined in patients who had undergone non-neurovascular preservation.

Aetiology and management of male erectile dysfunction and female sexual dysfunction in patients with cardiovascular disease

The historical basis for understanding erectile function as a neurovascular phenomenon and the advance from fanciful to effective treatment of erectile dysfunction (ED) are reviewed, with emphasis on patients with cardiovascular disease (CVD). ED occurs in 60% of CVD patients by 40 years of age. Male ED and female sexual dysfunction (FSD) diminish quality of life and often warn of occult CVD. ED is often unrecognised but is readily diagnosed during a 5-minute interview using a truncated International Index of Erectile Function questionnaire. Erection of the penis and clitoral engorgement result from local, arousal-induced release of neuronal and endothelial-derived nitric oxide (NO). Arterial vasodilatation and relaxation of cavernosal smooth muscle cells cause arterial blood to flood trabecular spaces, compressing venous drainage, resulting in tumescence. Cyclic guanosine monophosphate (cGMP)-induced activation of protein kinase G mediates the effects of NO by enhancing calcium sequestration and activating large-conductance, calcium-sensitive K+ channels. Future treatment strategies will likely enhance these pathways. Phosphodiesterase-5 inhibitors (sildenafil, tadalafil and vardenafil) increase cGMP levels in erectile tissue. These agents are effective in 80% of CVD patients with ED and can be used safely, even in the presence of stable coronary disease or congestive heart failure, provided nitrates are avoided and patients do not have hypotension, severe aortic stenosis or evocable myocardial ischaemia. Second-line therapies (vacuum constrictor device and transurethral or intracavernosal prostaglandin E1) can also be used in CVD patients. Treatment of FSD and its relationship to CVD are less well established, but similarities to ED exist. ED can be prevented by reduction of CVD risk factors, exercise, weight loss and abstinence from smoking.