PPEPGAINS
⚕ EDUCATIONAL CONTENT · NOT MEDICAL ADVICE · CONSULT A QUALIFIED PHYSICIAN BEFORE ANY USE
PEPGAINS/LIBRARY/SEXUAL/PT-141
Reviewed by PEPGAINS EDITORIAL·↗ View on PubMed
SEXUAL HEALTHFDA APPROVED

PT-141.

The Desire Peptide
AKA · Bremelanotide · Vyleesi
SEXUAL HEALTHSUBCUTANEOUSNASAL

FDA-approved for female sexual dysfunction. Works on the brain (not blood flow) to increase desire.

Jump to dosing ↓Read researchBuy at PEAK LAB ↗
~2.5 hours
Half-life
2
Citations
2
Routes
1
Categories
Store
Storage
55
Popularity

AT A GLANCE.

§ 01 · TL;DR

THE QUICK READ.

FDA-approved for female sexual dysfunction. Works on the brain (not blood flow) to increase desire.

Activates melanocortin receptors in the brain to increase sexual desire and arousal.

WHAT IT MIGHT HELP WITH.

1
Increased sexual desire
2
Works on brain (not just blood flow)
3
Effective for both genders
4
Works when Viagra/Cialis don't
5
FDA approved option

HOW IT WORKS.

§ 02 · MECHANISM

Activates melanocortin receptors in the brain to increase sexual desire and arousal.

MC4R agonist affecting the central nervous system pathways involved in sexual desire, distinct from PDE5 inhibitors.

WHO IT'S FOR
  • ✓Female hypoactive sexual desire disorder
  • ✓Male sexual dysfunction
  • ✓Those who don't respond to PDE5 inhibitors
WHO SHOULD AVOID
  • ✕Uncontrolled hypertension
  • ✕Cardiovascular disease
  • ✕Those on vasopressors

THE RESEARCH.

§ 03 · 2 STUDIES
2019 · FINDING
CITED

RECONNECT Trials

Significant increase in satisfying sexual events vs placebo

Source ↗
2023 · FINDING
CITED

Male Sexual Dysfunction Study

Demonstrated efficacy for erectile dysfunction with central mechanism of action

Source ↗

DOSING PROTOCOL.

§ 04 · DOSING
TYPICAL RANGE
Research reported dose
1.75mg subcutaneous, 45 min before activity
FREQUENCY
Most-cited schedule
As needed, max 8 doses/month
ROUTES
Delivery methods
SUBCUTANEOUS · NASAL
HALF-LIFE
Steady state drives frequency
~2.5 hours
STORAGE
Protect from light, refrigerate
Store lyophilized powder
⚠ NOTE

These are reported protocols from research literature and practitioner accounts, not prescriptions. No FDA-approved human dose exists for research compounds. Anyone using PT-141 should work with a qualified physician and source from a supplier providing third-party COAs.

FORMS AVAILABLE
  • · Subcutaneous injection
  • · Nasal spray (research)
⚠ RESEARCH INFORMATION ONLY · NOT MEDICAL ADVICE
Open dosing calculator →

SIDE EFFECTS & RISKS.

§ 06 · SAFETY
•
Nausea
Common (40%) · moderate
·
Flushing
Common · mild
·
Headache
Common · mild
·
Skin darkening
Occasional with repeated use · mild

WHERE TO SOURCE

§ 07 · SUPPLIER
PEAK LAB
PEPTIDES
SUPPLIER OF RECORD · 12 BATCHES PASSED

We tried nine suppliers across 2025 and kept picking PEAK LAB for PT-141: 99.4% HPLC purity, COA on every batch, cold chain intact. Shop through our link and we earn a small commission — affiliate relationship is disclosed.

Visit PEAK LAB ↗

COMMON QUESTIONS.

§ 08 · FAQ
How is PT-141 different from Viagra/Cialis?
Viagra/Cialis work on blood flow (PDE5 inhibitors). PT-141 works in the brain on melanocortin receptors affecting desire itself. It addresses 'want to' not just 'can.' They can be complementary.
Does PT-141 work for men?
Yes, though FDA approval (Vyleesi) is only for women. Research shows significant improvement in erectile function and desire in men. Off-label use is common.
Why does PT-141 cause nausea?
About 40% experience nausea due to melanocortin receptor effects. It typically decreases with subsequent doses. Taking with light food and starting with lower dose helps.
Can PT-141 darken my skin?
Yes, it can increase melanin production causing tanning, especially with repeated use. This is related to its melanocortin mechanism (same pathway as Melanotan).

MORE ON PT-141.

§ 10 · FIELD NOTES
◆ Guides · ★ FEATURE

Best Peptides for Women: Complete Guide (2026)

Comprehensive guide to peptides for women — hormonal considerations, top peptides by goal, safety guidelines, and what female researchers should know.

13 min·READ →
◆ Sourcing

FDA Peptide Reclassification 2026: What Actually Changed

Since 2023, the FDA has progressively tightened rules around compounding peptides. Here is what is legal, what is not, and what changed in 2025–2026.

10 min·READ →
◆ Education

Are Peptides Safe? What the Research Says

An honest look at peptide safety — FDA-approved vs research peptides, risks, and how to minimize them.

9 min·READ →
◆ THE PEPGAINS DISPATCH

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