Orexin-A vs Arginine Vasopressin
Head-to-head comparison of Orexin-A (Hypocretin-1 (Orexin-A)) and Arginine Vasopressin (8-Arginine Vasopressin) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Orexin-A | Arginine Vasopressin |
|---|---|---|
| Category | Cognitive Enhancement | Cognitive Enhancement |
| Full Name | Hypocretin-1 (Orexin-A) | 8-Arginine Vasopressin |
| Molecular Weight | 3562 Da | 1084.23 Da |
| Half-Life | Minutes to <1 hour | 10-20 minutes |
| Amino Acids | 33 | 9 |
| Typical Dose | Research-only; no validated human dose | 10-40 IU intranasal research range |
| Route | Intracerebroventricular/Intranasal | Intranasal/Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 42 | 100 |
| Research Status | Pre-clinical | Clinical |
Orexin-A Benefits
- ✓wakefulness
- ✓attention
- ✓memory consolidation
- ✓fatigue resistance
Arginine Vasopressin Benefits
- ✓memory consolidation
- ✓recall support
- ✓arousal-linked learning
- ✓social cognition
Orexin-A Dosing
Research-only i.c.v. microgram/nanomolar studies|intranasal experimental use|no established human protocol
Arginine Vasopressin Dosing
intranasal research dosing|10-40 IU per dose in studies|single or repeated administration
Orexin-A Side Effects
- ⚠insomnia
- ⚠headache
- ⚠blood pressure changes
Arginine Vasopressin Side Effects
- ⚠blood pressure elevation
- ⚠headache
- ⚠hyponatremia
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.
Arginine Vasopressin
Animal and human studies indicate vasopressin can modulate hippocampal and limbic circuits involved in learning and memory. The effect size is context dependent, and results vary by dose, route, and baseline cognitive state.
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