Endomorphin-1 vs Calcitonin
Head-to-head comparison of Endomorphin-1 (Tyr-Pro-Trp-Phe-NH2) and Calcitonin (Salmon Calcitonin) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Endomorphin-1 | Calcitonin |
|---|---|---|
| Category | Pain Management | Pain Management |
| Full Name | Tyr-Pro-Trp-Phe-NH2 | Salmon Calcitonin |
| Molecular Weight | 610.71 Da | 3431.9 Da |
| Half-Life | Minutes in plasma | about 10-15 minutes |
| Amino Acids | 4 | 32 |
| Typical Dose | 0.1-10 ug per animal | 100 IU/day SC or 200 IU/day intranasal |
| Route | Intrathecal / subcutaneous | Intranasal/Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 600 | 350 |
| Research Status | Pre-clinical | Approved |
Endomorphin-1 Benefits
- ✓mu-opioid selectivity
- ✓potent antinociception
- ✓endogenous peptide scaffold
- ✓useful for receptor-discovery studies
Calcitonin Benefits
- ✓bone pain relief
- ✓short-term analgesic effect
- ✓may reduce opioid requirement
- ✓useful in osteoporotic fracture pain
Endomorphin-1 Dosing
Intrathecal 0.1-10 ug per animal|Subcutaneous 0.1-5 ug per animal|In vitro 0.1-100 nM
Calcitonin Dosing
100 IU subcutaneous daily|200 IU intranasal daily|short-term use in acute pain settings
Endomorphin-1 Side Effects
- ⚠respiratory depression at high exposure
- ⚠sedation
- ⚠tolerance and dependence potential
Calcitonin Side Effects
- ⚠nausea
- ⚠flushing
- ⚠rhinitis
Research Overview
Endomorphin-1
Endomorphin-1 is a key research peptide in studies of endogenous mu-opioid signaling and spinal analgesia. Like other peptide analgesics, its main translational hurdles are enzymatic instability, limited oral bioavailability, and delivery across barriers.
Calcitonin
Calcitonin has been evaluated in randomized trials and reviews for pain associated with vertebral compression fractures and other bone-related conditions. The signal is strongest for short-term analgesia rather than long-term chronic pain control.
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