GLP-1 and Weight Loss Drugs: Effects on Sexual Function in Men and Women
GLP-1 drugs improve erectile function and testosterone in men, while evidence in women is limited. Tirzepatide achieves unprecedented weight loss but may have sexual side effects.
Quick Facts
What This Study Found
GLP-1 RAs improve erectile function, testosterone, and sperm parameters in men. Tirzepatide case reports suggest potential sexual side effects. Setmelanotide demonstrates melanocortin pathway involvement in sexual function. Sexual outcomes are underrepresented as trial endpoints.
Key Numbers
How They Did This
Narrative review of PubMed, Scopus, and Embase for studies reporting sexual outcomes (FSFI, IIEF, or clinical reports) related to obesity pharmacotherapies.
Why This Research Matters
Sexual dysfunction affects quality of life as much as many chronic diseases. Understanding how weight loss drugs affect sexual health helps clinicians counsel patients and design better trials.
The Bigger Picture
This highlights a significant gap in clinical trial design: the most widely prescribed drugs for obesity rarely measure sexual function as a primary outcome.
What This Study Doesn't Tell Us
Most evidence is secondary outcomes or case reports. Sex-specific data extremely limited for women. Cannot distinguish direct drug effects from weight loss effects. Validated sexual function measures rarely used.
Questions This Raises
- ?Should future GLP-1 trials include validated sexual function measures as primary endpoints?
- ?What is the mechanism of tirzepatide's potential sexual side effects?
- ?How do GLP-1 drug effects on sexual function compare between men and women?
Trust & Context
- Key Stat:
- Gender gap in evidence GLP-1 drugs show clear sexual benefits in men but direct evidence in women remains almost nonexistent
- Evidence Grade:
- Narrative review of mostly secondary outcomes and case reports. Important gap identification but evidence quality is low throughout.
- Study Age:
- Published in 2025.
- Original Title:
- Beyond metabolism: sexual dysfunction and weight-loss drugs.
- Published In:
- Sexual medicine reviews, 14(1) (2026)
- Authors:
- Fuentes-Mendoza, Jenyfer M, Concepción-Zavaleta, Marcio J, Mendoza-Godoy, Jeny J, Concepción-Urteaga, Luis, Paz-Ibarra, José, Coronado-Arroyo, Julia C
- Database ID:
- RPEP-15176
Evidence Hierarchy
Frequently Asked Questions
Do GLP-1 drugs affect sexual function?
In men, the evidence is positive: GLP-1 drugs improve erectile function, testosterone, and sperm quality. In women, there isn't enough data to draw conclusions. Tirzepatide may have sexual side effects in some patients.
Why isn't sexual function routinely measured in weight loss drug trials?
It's typically only measured as a secondary outcome if at all. This review calls for validated sexual function questionnaires to be included as primary endpoints in future obesity drug trials.
Read More on RethinkPeptides
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Cite This Study
https://rethinkpeptides.com/research/RPEP-15176APA
Fuentes-Mendoza, Jenyfer M; Concepción-Zavaleta, Marcio J; Mendoza-Godoy, Jeny J; Concepción-Urteaga, Luis; Paz-Ibarra, José; Coronado-Arroyo, Julia C. (2026). Beyond metabolism: sexual dysfunction and weight-loss drugs.. Sexual medicine reviews, 14(1). https://doi.org/10.1093/sxmrev/qeaf074
MLA
Fuentes-Mendoza, Jenyfer M, et al. "Beyond metabolism: sexual dysfunction and weight-loss drugs.." Sexual medicine reviews, 2026. https://doi.org/10.1093/sxmrev/qeaf074
RethinkPeptides
RethinkPeptides Research Database. "Beyond metabolism: sexual dysfunction and weight-loss drugs." RPEP-15176. Retrieved from https://rethinkpeptides.com/research/fuentes-mendoza-2026-beyond-metabolism-sexual-dysfunction
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.