Clinical trial evidence on emerging pharmacological therapies for hypoactive sexual desire disorder in women: a systematic review and analysis of completed studies registered on ClinicalTrials.gov.
This systematic review evaluated the clinical trial evidence base for pharmacological treatments of Hypoactive Sexual Desire Disorder (HSDD) in adult women by systematically searching ClinicalTrials.gov in accordance with PRISMA 2020 guidelines. Nine completed interventional clinical trials met the inclusion criteria, most of which were Phase II or Phase III randomized, double-blind, placebo-controlled studies enrolling primarily premenopausal women with acquired, generalized HSDD. The most extensively studied agents were flibanserin and bremelanotide, both of which target central nervous system pathways involved in sexual desire. Efficacy was most commonly assessed using validated patient-reported outcome tools such as the Female Sexual Function Index desire domain and the Female Sexual Distress Scale. The review found notable heterogeneity across trials in endpoint designation, reporting completeness, and safety data presentation, which limited cross-trial comparisons. Adverse events generally reflected the pharmacological mechanisms of the agents studied. The authors concluded that while progress has been made, significant gaps remain in the pharmacological treatment landscape for HSDD, and called for more standardized trial methodologies and comprehensive outcome reporting to strengthen the overall evidence base. A key limitation is that findings were synthesized descriptively without pooled quantitative (meta-analytic) analysis.
Why this grade: This is a systematic review of registered clinical trials without pooled meta-analysis; it synthesizes existing trial-level evidence descriptively rather than generating new primary data.
Background Hypoactive Sexual Desire Disorder (HSDD) is a prevalent and distressing condition affecting adult women and is associated with significant impairments in quality of life and interpersonal relationships. Despite increasing recognition of female sexual health as a clinical priority, pharmacological treatment options for HSDD remain limited, and evidence from individual clinical trials remains heterogeneous. Therefore, a systematic evaluation of registered clinical trials is essential to better understand therapeutic development, efficacy endpoints, and safety profiles of emerging treatments. Methods This systematic review was conducted in accordance with PRISMA 2020 guidelines using a structured search of ClinicalTrials.gov. Completed interventional clinical trials evaluating pharmacological therapies for HSDD in adult women were identified using predefined eligibility criteria. Data were extracted on study design, participant characteristics, investigational agents, efficacy outcomes related to sexual desire and distress, and reported safety outcomes. Findings were synthesized descriptively without pooled quantitative analysis. Results A total of nine completed pharmacological clinical trials met the inclusion criteria. Most were Phase II and Phase III randomized, double-blind, placebo-controlled studies, primarily enrolling premenopausal women with acquired, generalized HSDD. Investigational therapies predominantly targeted central nervous system pathways, with flibanserin and bremelanotide representing the most extensively studied agents. Efficacy outcomes commonly included validated patient-reported measures such as the Female Sexual Function Index desire domain and the Female Sexual Distress Scale; however, endpoint designation and reporting completeness varied across trials. Safety data were inconsistently reported, with adverse events reflecting the pharmacological mechanisms of the agents studied. Conclusion The findings highlight both progress and persistent gaps in the pharmacological treatment landscape for HSDD. Variability in trial design, outcome measures, and reporting practices limits cross-trial comparison and clinical interpretation. Further research with standardized methodologies and comprehensive reporting is needed to strengthen the evidence base.
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