C-peptide vs PT-141
Head-to-head comparison of C-peptide (Connecting peptide (C-peptide)) and PT-141 (Bremelanotide (Melanocortin Receptor Agonist)) — benefits, dosing, side effects, research data, and where to buy.
| Property | C-peptide | PT-141 |
|---|---|---|
| Category | Pain Management | Performance |
| Full Name | Connecting peptide (C-peptide) | Bremelanotide (Melanocortin Receptor Agonist) |
| Molecular Weight | 3020.3 Da | 1,025.2 Da |
| Half-Life | ~20-30 min | ~2.7 hours |
| Amino Acids | 31 | 7 |
| Typical Dose | no approved analgesic dose|research-only | 1.75 mg |
| Route | IV|subQ | SC |
| Purity | ≥98% | — |
| Studies Count | 46 | 178 |
| Research Status | Pre-clinical | FDA Approved |
C-peptide Benefits
- ✓diabetic neuropathy research
- ✓nerve function support
- ✓possible analgesic effect
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
C-peptide Dosing
0.5-1.0 mg/day in research|route varies by 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
C-peptide Side Effects
- ⚠injection-site reactions
- ⚠unknown long-term safety
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
C-peptide
C-peptide is not an approved analgesic, but multiple studies have examined its effects on peripheral nerve blood flow and neuropathy outcomes. The strongest relevance is in diabetic neuropathic pain rather than migraine.
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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