Orexin-A vs Anamorelin
Head-to-head comparison of Orexin-A (Hypocretin-1 (Orexin-A)) and Anamorelin (Anamorelin hydrochloride (ONO-7643)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Orexin-A | Anamorelin |
|---|---|---|
| Category | Cognitive Enhancement | Growth Hormone |
| Full Name | Hypocretin-1 (Orexin-A) | Anamorelin hydrochloride (ONO-7643) |
| Molecular Weight | 3562 Da | N/A |
| Half-Life | Minutes to <1 hour | about 9 hours |
| Amino Acids | 33 | N/A |
| Typical Dose | Research-only; no validated human dose | 50 mg/day |
| Route | Intracerebroventricular/Intranasal | Oral |
| Purity | ≥98% | ≥98% |
| Studies Count | 42 | 95 |
| Research Status | Pre-clinical | Clinical |
Orexin-A Benefits
- ✓wakefulness
- ✓attention
- ✓memory consolidation
- ✓fatigue resistance
Anamorelin Benefits
- ✓stimulates appetite
- ✓raises IGF-1
- ✓may support weight gain
- ✓oral dosing
Orexin-A Dosing
Research-only i.c.v. microgram/nanomolar studies|intranasal experimental use|no established human protocol
Anamorelin Dosing
50 mg orally once daily|often studied with food or per protocol|track weight, appetite, and glucose markers
Orexin-A Side Effects
- ⚠insomnia
- ⚠headache
- ⚠blood pressure changes
Anamorelin Side Effects
- ⚠hyperglycemia
- ⚠peripheral edema
- ⚠constipation or nausea
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.
Anamorelin
Trials in cachexia populations showed increased appetite and modest gains in body weight and IGF-1. Regulatory progress has varied by region, but it remains a well-studied ghrelin agonist in the GH space.
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