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PT-141 (Bremelanotide) Peptide
Melanocortin agonist researched for sexual desire and arousal.
What is PT-141 (Bremelanotide)?
PT-141 (Bremelanotide) is a sexual health · neurologic peptide studied for hypoactive sexual desire disorder (fda-approved as vyleesi in premenopausal women) and male erectile response (research). Below is an educational overview of PT-141 (Bremelanotide) peptide benefits, mechanism, common research protocols, dosage references, and known side effects.
Plain-Language Label Highlights
Brand names: Vyleesi (bremelanotide)
Low sexual desire (HSDD) in premenopausal women, used on demand.
A shot you take before intimacy that works in the brain — not on blood flow — to help bring back sexual desire.
- •Nausea (very common, especially first dose)
- •Flushing
- •Headache
- •Injection-site reaction
- •Vomiting
- •Short-term spikes in blood pressure
- •Darkening of skin or gums with repeated use
- •Slowed heart rate
- •You have uncontrolled high blood pressure
- •You have known heart disease
- •You are pregnant or could become pregnant during use
Educational summary of the FDA prescribing information. Not a substitute for the full label or medical advice. Always discuss with a licensed prescriber.
PT-141 (Bremelanotide) Mechanism of Action
A synthetic analog of α-MSH that activates melanocortin receptors (primarily MC4R) in the central nervous system. Unlike PDE5 inhibitors, it acts on neural pathways governing sexual desire rather than vascular flow.
PT-141 (Bremelanotide) Research Areas & Benefits
PT-141 (Bremelanotide) Dosage & Common Research Protocols
Single subcutaneous dose approximately 45 minutes before anticipated activity in approved indication.
Protocols summarized for educational reference from published research. Not dosing guidance.
PT-141 (Bremelanotide) Research Protocol Table
Structured summary of dosing, routes, and durations as described in published research and FDA labels. Educational reference only — not dosing guidance.
| Context | Population | Route | Dose | Duration | Notes |
|---|---|---|---|---|---|
| Hypoactive sexual desire disorder (HSDD), premenopausal women | Adult premenopausal women (FDA-approved indication) | Subcutaneous autoinjector (abdomen or thigh) | 1.75 mg | On-demand, ≥45 minutes before sexual activity; no more than 1 dose / 24 h, ≤8 doses / month | Reflects the FDA-approved Vyleesi prescribing information for HSDD in premenopausal women. |
| Erectile-response research (men) | Adult men in published Phase II trials | Subcutaneous injection | Ranges of 1.0–6.0 mg studied; commonly cited research dose ~1.75 mg | Single-dose, on-demand within published studies | Not an FDA-approved indication; intranasal PT-141 program in men was discontinued over blood-pressure signals. |
| Off-label exploratory use (general research literature) | Both sexes, varied | Subcutaneous | 0.5–2 mg ranges cited in non-clinical literature | Acute, episodic | Off-label discussion only — no validated long-term protocol exists. |
PT-141 (Bremelanotide) Research — Female vs Male Studies
How published PT-141 (Bremelanotide) research breaks down by sex, including which populations were studied and what trial data exist.
Female research
PT-141 (bremelanotide, brand name Vyleesi) is FDA-approved for hypoactive sexual desire disorder in premenopausal women, supported by the RECONNECT Phase III trials.
- Premenopausal women with acquired, generalized HSDD
- Excluded: postmenopausal women, cardiovascular high-risk subjects
- • Primary endpoints in RECONNECT-1/2 measured change in desire (FSFI-D) and decrease in distress (FSDS-DAO Item 13).
- • Most-reported adverse events: nausea, flushing, headache, injection-site reactions.
- • Transient blood-pressure increases reported; not recommended for women with uncontrolled hypertension or known cardiovascular disease.
Male research
In men, PT-141 has been studied for erectile function but is not FDA-approved. The intranasal development program was discontinued due to blood-pressure concerns; subcutaneous research data remain limited.
- Adult men with erectile dysfunction, including PDE5-inhibitor non-responders, in Phase II research
- • Published erectile-response signals in Phase II trials did not translate into an approved indication.
- • Hypertensive episodes were the principal safety concern that ended intranasal development.
- • Any male use today is off-label; no validated dosing schedule exists for men outside research settings.
PT-141 (Bremelanotide) — Frequently Asked Questions
Is PT-141 FDA-approved for women?+
Yes. Bremelanotide (brand name Vyleesi) is FDA-approved for hypoactive sexual desire disorder (HSDD) in premenopausal women, administered as a 1.75 mg subcutaneous autoinjector on demand.
Is PT-141 FDA-approved for men?+
No. PT-141 is not FDA-approved for any indication in men. Earlier intranasal development in men was discontinued because of transient blood-pressure increases observed in trials.
How long does PT-141 take to work?+
Published research and the Vyleesi label describe dosing about 45 minutes before anticipated activity, with effects typically lasting several hours.
What are the most common PT-141 side effects?+
Nausea, flushing, headache and injection-site reactions are most frequently reported. Transient increases in blood pressure and decreases in heart rate have also been documented.
Who should not use PT-141?+
People with uncontrolled hypertension or known cardiovascular disease are advised against PT-141 in the FDA label. It is also not indicated in postmenopausal women, men, or pediatric populations.
PT-141 (Bremelanotide) Studies & Cited Research
Bremelanotide for hypoactive sexual desire disorder
Phase 3 RECONNECT trials supporting FDA approval.
Why we trust this source: Published in a peer-reviewed scientific journal with editorial and reviewer oversight.
Citations are linked to PubMed, Google Scholar, and Crossref searches so you can verify the source independently. All references are reviewed during our editorial passes (last reviewed June 1, 2026).
PT-141 (Bremelanotide) Side Effects & Safety Considerations
- •FDA-approved (Vyleesi) only for HSDD in premenopausal women.
- •Can cause nausea, flushing, transient blood pressure increases.
- •Avoid in uncontrolled hypertension or cardiovascular disease.
Common questions about PT-141 (Bremelanotide)
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Educational Information Only — Not Medical Advice
All content on this page is for educational and informational purposes only. It is not medical advice, diagnosis, or treatment. We make no claims that any peptide can diagnose, treat, cure, or prevent any disease. Peptides discussed are not FDA-approved for the indications listed unless explicitly stated otherwise.
Always consult a licensed healthcare provider before beginning any wellness protocol. Statements have not been evaluated by the FDA. Compounded preparations are subject to applicable state and federal regulations. Availability, eligibility, and pricing may vary.
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