Sexual health peptide protocols — PT-141 (bremelanotide) and kisspeptin. Dose ranges, timing, onset, duration, side effects, and reconstitution guidance.
Sexual-health peptides act centrally rather than vascularly. PT-141 (bremelanotide) is a melanocortin receptor agonist studied for libido in both sexes, typically dosed subcutaneously 45 minutes to several hours before activity, with nausea and transient flushing as the most commonly reported effects.
Category overview
Enhance libido, sexual function, and intimate wellness. These peptides work through central nervous system mechanisms rather than direct vascular effects.
Protocols at a glance
Peptide
Dose range
Frequency
Cycle
PT-141
0.5 – 2 mg
As needed (1–2 hours before)
As-needed only; max 8 doses per month per FDA guidelines
Kisspeptin
1 – 5 nmol/kg
Protocol-dependent (clinical use)
Research compound; typically single-dose or short-term
Melanotan II
100 – 500+ mcg
Loading then weekly maintenance
Loading 2–4 weeks, then maintenance 1–2×/week
PT-141 — Bremelanotide / Vyleesi
FDA-approved melanocortin receptor agonist for hypoactive sexual desire disorder. Works in the brain to enhance sexual desire rather than just mechanical function.
Dose range: 0.5 – 2 mg. Frequency: As needed (1–2 hours before). Cycle: As-needed only; max 8 doses per month per FDA guidelines.
Reconstitution: 2mg → 1ml bacteriostatic water
Reconstitution: 5mg → 2ml bacteriostatic water
Reconstitution: 10mg → 2ml bacteriostatic water
Increases sexual desire and arousal via CNS mechanism
FDA-approved (Vyleesi) for female sexual dysfunction
Works independently of vascular function (unlike Viagra)
Effective for psychological arousal issues
Expect flushing; manage nausea.
Stacks: Generally used alone; may combine with ED meds under medical supervision
Kisspeptin
Master regulator of reproductive hormone cascade. Stimulates GnRH release to boost LH, FSH, and downstream sex hormones.
Dose range: 1 – 5 nmol/kg. Frequency: Protocol-dependent (clinical use). Cycle: Research compound; typically single-dose or short-term.
Reconstitution: 2mg → 1ml bacteriostatic water
Reconstitution: 5mg → 2ml bacteriostatic water
Reconstitution: 10mg → 2ml bacteriostatic water
Stimulates natural testosterone/estrogen production
Key player in puberty and reproductive function
May restore hormone function in hypogonadism
Enhances sexual desire through hormonal pathways
Not for routine self-administration.
Stacks: Best used under endocrinologist supervision; may combine with HCG or fertility peptides
Melanotan II
Synthetic melanocortin analog that produces tanning and sexual arousal effects. Popular for cosmetic tanning but carries significant risks. Use with extreme caution.
Dose range: 100 – 500+ mcg. Frequency: Loading then weekly maintenance. Cycle: Loading 2–4 weeks, then maintenance 1–2×/week.
Reconstitution: 2mg → 1ml bacteriostatic water
Reconstitution: 5mg → 1ml bacteriostatic water
Reconstitution: 10mg → 2ml bacteriostatic water
Produces deep tan without UV exposure
Significant libido and erectile enhancement
Appetite suppression effects
PT-141 was derived from this compound
MUST monitor for mole changes; controversial safety profile.
Stacks: Generally used alone; anti-nausea support may be needed
Safety principles
Start Low, Go Slow: Always begin with the minimum effective dose and titrate gradually over weeks.
Get Baseline Bloodwork: Before starting, obtain labs including CBC, CMP, lipid panel, hormone panel (testosterone, estrogen, IGF-1, GH), fasting insulin, HbA1c, liver enzymes, and inflammatory markers.
Monitor Regularly: Retest labs every 4–8 weeks. Track subjective markers daily (sleep, energy, mood, appetite, injection site reactions).
Source Responsibly: Only use peptides from reputable compounding vendors with third-party COA testing. We STRONGLY recommend they also are based out of the USA for quality assurance.
Recognize Warning Signs: Stop immediately and seek medical attention for severe injection site reactions, difficulty breathing, chest pain, severe headache, vision changes, or allergic reactions.
Drug Interactions: Many peptides interact with insulin, diabetes drugs, blood thinners, immunosuppressants, and hormonal therapies.
Contraindications: Not for pregnant/breastfeeding women, individuals under 18, those with active cancer, severe liver/kidney disease, or uncontrolled diabetes.
Important
All peptide products referenced are intended solely for research, investigational, or licensed professional use. They are not FDA-approved and are not intended to diagnose, treat, cure, or prevent any disease. Consult a licensed medical practitioner before any personal or clinical use.