Neuropeptide S vs PT-141
Head-to-head comparison of Neuropeptide S (Neuropeptide S) and PT-141 (Bremelanotide (Melanocortin Receptor Agonist)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Neuropeptide S | PT-141 |
|---|---|---|
| Category | Cognitive Enhancement | Performance |
| Full Name | Neuropeptide S | Bremelanotide (Melanocortin Receptor Agonist) |
| Molecular Weight | 2203 Da | 1,025.2 Da |
| Half-Life | Minutes to <1 hour | ~2.7 hours |
| Amino Acids | 20 | 7 |
| Typical Dose | Research-only; no validated human dose | 1.75 mg |
| Route | Intracerebroventricular/Intranasal | SC |
| Purity | ≥98% | — |
| Studies Count | 28 | 178 |
| Research Status | Pre-clinical | FDA Approved |
Neuropeptide S Benefits
- ✓anxiolysis
- ✓stress resilience
- ✓attention support
- ✓arousal modulation
PT-141 Benefits
- ✓Enhances sexual desire and arousal
- ✓Works through CNS (not vascular)
- ✓FDA-approved for HSDD
- ✓Effective for both men and women
- ✓Does not require sexual stimulation to work
Neuropeptide S Dosing
0.1-1 nmol i.c.v. in animal studies|intranasal research-only exploration|no established human protocol
PT-141 Dosing
Standard: 1.75 mg SC, 45 min before activity|Max frequency: Once every 24 hours|Max: 8 doses per month|Men (off-label): 1-2 mg SC as needed
Neuropeptide S Side Effects
- ⚠sleep disruption
- ⚠headache
- ⚠jitteriness
PT-141 Side Effects
- ⚠Common: Nausea (40%), flushing, headache, injection site reactions
- ⚠Moderate: Elevated blood pressure (transient), fatigue
- ⚠Serious: Focal hyperpigmentation with repeated use
- ⚠Contraindications: Uncontrolled hypertension, cardiovascular disease
Research Overview
Neuropeptide S
Animal studies suggest NPS can reduce anxiety-like behavior while altering wakefulness and alertness through the NPS receptor system. Human cognitive data are very limited, and it has no approved clinical indication.
PT-141
PT-141 has robust clinical evidence including multiple Phase III trials. FDA-approved in 2019. Unique mechanism of action through melanocortin-4 receptors in the brain. Well-characterized safety and efficacy profile.
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