What PT-141 Is
PT-141 (Bremelanotide) is a melanocortin peptide studied for its ability to stimulate sexual arousal pathways in the brain.
It is the same active compound used in the FDA-approved medication Vyleesi, which is prescribed for hypoactive sexual desire disorder.
Reconstitution
• Add 5.0 mL bacteriostatic water → final concentration 2.0 mg/mL
• This dilution allows convenient measurement of milligram doses.
Typical Dose Range
• 1.0 mg – 2.0 mg per injection
• Often used on demand, not daily.
• Many protocols start at 1.0 mg and increase if needed.
The approved pharmaceutical dose of Vyleesi is 1.75 mg.
Syringe Math
• At 2.0 mg/mL → 1 unit = 0.01 mL ≈ 20 mcg
Storage
Lyophilized:
• Store frozen at −20 °C
Reconstituted:
• Refrigerate at 2–8 °C
• Use within 2–4 weeks
On-Demand Dosing Schedule
Dose | Syringe Units | Volume |
1.0 mg | 50 units | 0.50 mL |
1.5 mg | 75 units | 0.75 mL |
2.0 mg | 100 units | 1.00 mL |
Frequency: As needed, subcutaneous
Timing: 30–60 minutes before activity
Maximum frequency commonly referenced:
• No more than once within 24 hours
• Often limited to 2–3 times per week
Supply Planning
PT-141 10mg Vials
8 uses at 1.25 mg per dose
6 uses at 1.75 mg per dose
5 uses at 2 mg per dose
Syringes
1 per injection
Bacteriostatic Water
5 mL per vial
Alcohol Pads
2 per injection
Protocol Overview
Goal:
Support activation of central melanocortin pathways involved in sexual arousal.
Structure:
• On-demand injections
• Dose range 1.0–2.0 mg
• Effects typically begin 30–60 minutes after injection
Injection Technique
Before injecting:
• Wash hands
• Clean vial stopper
• Clean injection site
• Draw dose and remove air bubbles
How to inject:
Pinch skin
Insert needle at 90° (or 45° if lean)
Inject slowly
Remove needle
Dispose in sharps container
How PT-141 Works
PT-141 activates melanocortin receptors (mostly MC3R and MC4R) in the brain.
This boosts dopamine in areas linked to motivation, reward, and arousal.
What it does not do:
It doesn’t directly affect blood flow like Viagra or Cialis.
Erections (in men) are a downstream effect of brain-level signaling.
Side effects like mild flushing or higher BP come from peripheral melanocortin activity.
Benefits & Side Effects
Potential Benefits
Boosts sexual desire
Reduces distress associated with low libido
Works for both men and women
Subcutaneous form offers strong, consistent absorption
Common Side Effects
Nausea
Flushing
Headache
Temporary blood pressure increase
Mild skin darkening with repeated use
Most are mild and short-lasting.
Lifestyle Tips for Best Results
Communicate timing with your partner
Address stress, sleep, and relationship factors
Avoid heavy alcohol before use
Maintain adequate sleep and hydration
Disclaimer:
All peptide products sold on this website are for research, laboratory, and educational purposes only. They are not approved by the FDA or Health Canada, are not intended for human consumption, and should not be used for medical, cosmetic, or therapeutic purposes unless specifically prescribed by a licensed healthcare professional.
The information provided on this site is for informational and educational purposes only and does not constitute medical advice. Product descriptions, protocols, or references are not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before beginning any new protocol, supplement, or treatment.
By purchasing from this website, you acknowledge and agree to use these products responsibly and in accordance with all applicable laws and guidelines.