Overview
This protocol outlines the concurrent use of two melanocortin receptor agonists for research purposes: Melanotan II for melanin induction and PT-141 for sexual function support. Both peptides are administered via separate injections using subcutaneous or intramuscular routes.
Composition
Melanotan II (10mg Vial)
– Pure lyophilized peptide powder
– Requires reconstitution with bacteriostatic water
– Activates MC1R and MC3/4R receptors
PT-141 (10mg Vial)
– Pure lyophilized peptide powder
– Requires reconstitution with bacteriostatic water
– Selective MC4R agonist
Reconstitution Guide
Melanotan II
– Diluent: 3.0 mL bacteriostatic water
– Final concentration: 3.33 mg/mL
Steps:
1. Draw 3.0 mL bacteriostatic water into sterile syringe
2. Inject slowly against vial wall; avoid vigorous shaking
3. Swirl gently until completely dissolved
4. Label vial with reconstitution date
PT-141
– Diluent: 1.0 mL bacteriostatic water
– Final concentration: 10 mg/mL
Steps:
1. Draw 1.0 mL bacteriostatic water into sterile syringe
2. Inject gently into vial; swirl to dissolve completely
3. Label with reconstitution date
Dosage Protocols
Melanotan II — Standard/Gradual Approach
| Week | Dose | Volume (mL) | Frequency |
|---|---|---|---|
| 1–2 | 0.25 mg (250 mcg) | ~0.075 mL (~7.5 units) | 2× per week |
| 3–4 | 0.5 mg (500 mcg) | ~0.15 mL (~15 units) | 2× per week |
Note: Week 1 injections may be under 10 units; use a 30 or 50-unit insulin syringe for improved accuracy.
PT-141 — On-Demand Protocol
| Application | Dose | Volume (mL) | Timing |
|---|---|---|---|
| Female HSDD | 1.75 mg (1750 mcg) | ~0.18 mL (~18 units) | ≥45 min before activity; max 1 dose/24h, ≤8 doses/month |
| Male ED (off-label) | 1.0–2.0 mg | 0.1–0.2 mL | 30–60 min before activity; max 1 dose/24h, ≤8 doses/month |
| Alternative schedule | 1 mg | ~0.1 mL (10 units) | Twice weekly |
Administration Guidelines
– Administer both peptides on the same day if desired
– Use separate syringes and injection sites — do not mix in a single syringe
– Melanotan II: Two consistent days per week (e.g., Monday & Thursday)
– PT-141: On-demand before activity, or twice weekly per alternative schedule
Injection technique:
1. Clean vial stopper and injection site with alcohol swab
2. Insert needle at 45–90° into subcutaneous tissue
3. Inject slowly; rotate injection sites (abdomen, thigh, etc.)
4. Use new sterile syringe for each injection
Cycle Duration
– Melanotan II: 4-week cycle
– PT-141: Flexible; use as needed per protocol
Storage
Lyophilized vials: Store frozen until reconstitution
Reconstituted solution:
– Store at 2–8°C, protected from light
– Maintain refrigeration to preserve potency
– Avoid repeated freeze-thaw cycles
How These Peptides Work
Melanotan II
– Activates MC1R receptors → stimulates melanin synthesis (tanning response)
– Activates MC3/4R receptors → contributes to libido enhancement
– Reduces UV damage sensitivity through increased baseline pigmentation
PT-141
– Activates MC4R receptors in the central nervous system
– Promotes sexual arousal and desire through melanocortin signaling
– Acts independently of vascular or hormonal pathways
Synergy
Both peptides work through separate receptor pathways, yielding complementary outcomes when used together.
Potential Benefits
– Enhanced baseline pigmentation; reduced UV sensitivity
– Improved sexual desire and function
– Complementary mechanisms of action
Possible Side Effects
– Nausea
– Facial flushing
– Headache
– Blood pressure elevation
– Pigment changes (moles or existing lesions may darken)
Important Considerations
– Rotate injection sites to prevent tissue damage
– Always use new sterile syringes
– Keep detailed records of dose, date, and observed effects
– Watch for nausea, flushing, and blood pressure changes
– Never combine both peptides in a single syringe
Lifestyle Factors
– Maintain a protein-rich diet and stay hydrated
– Engage in regular physical exercise
– Allow adequate recovery and rest
– Prioritize quality sleep and stress management
Disclaimer
This guide is provided for educational and research purposes only. It is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional before beginning any research protocol. Users assume all responsibility for their own safety and adherence to applicable laws.