Orexin-A vs Bremelanotide
Head-to-head comparison of Orexin-A (Hypocretin-1 (Orexin-A)) and Bremelanotide (Bremelanotide (PT-141), cyclic melanocortin receptor agonist) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Orexin-A | Bremelanotide |
|---|---|---|
| Category | Cognitive Enhancement | Sexual Health |
| Full Name | Hypocretin-1 (Orexin-A) | Bremelanotide (PT-141), cyclic melanocortin receptor agonist |
| Molecular Weight | 3562 Da | 1025.2 Da |
| Half-Life | Minutes to <1 hour | about 2.7 h |
| Amino Acids | 33 | 7 |
| Typical Dose | Research-only; no validated human dose | 1.75 mg |
| Route | Intracerebroventricular/Intranasal | Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 42 | 200 |
| Research Status | Pre-clinical | Clinical |
Orexin-A Benefits
- ✓wakefulness
- ✓attention
- ✓memory consolidation
- ✓fatigue resistance
Bremelanotide Benefits
- ✓increases sexual desire
- ✓supports arousal
- ✓may improve erectile response
- ✓on-demand use
Orexin-A Dosing
Research-only i.c.v. microgram/nanomolar studies|intranasal experimental use|no established human protocol
Bremelanotide Dosing
1.75 mg subcutaneous PRN|administer about 45 minutes before activity|max 1 dose per 24 hours
Orexin-A Side Effects
- ⚠insomnia
- ⚠headache
- ⚠blood pressure changes
Bremelanotide Side Effects
- ⚠nausea
- ⚠flushing
- ⚠headache
- ⚠transient blood pressure increase
Research Overview
Orexin-A
Preclinical studies link orexin signaling to arousal, learning, and memory consolidation, making orexin-A a candidate for cognition-related research. It is not an approved cognitive enhancer and remains an experimental peptide.
Bremelanotide
Human studies and approval data support meaningful effects on sexual desire in women, with a central mechanism involving melanocortin signaling. It is one of the most clinically relevant peptides in this category and is commonly used as the reference compound for PT-141-type research.
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