Nociceptin vs DPDPE
Head-to-head comparison of Nociceptin (Nociceptin/orphanin FQ) and DPDPE ([D-Pen2, D-Pen5]-enkephalin) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Nociceptin | DPDPE |
|---|---|---|
| Category | Pain Management | Pain Management |
| Full Name | Nociceptin/orphanin FQ | [D-Pen2, D-Pen5]-enkephalin |
| Molecular Weight | 1881.1 Da | 645.79 Da |
| Half-Life | ~minutes | 15-60 minutes in plasma |
| Amino Acids | 17 | 5 |
| Typical Dose | no approved human dose|research-only | 0.01-1 ug per animal |
| Route | intrathecal|intranasal | Intrathecal / intracerebroventricular |
| Purity | ≥98% | ≥98% |
| Studies Count | 44 | 800 |
| Research Status | Pre-clinical | Pre-clinical |
Nociceptin Benefits
- ✓allodynia reduction
- ✓central pain modulation
- ✓neuropathic pain research
DPDPE Benefits
- ✓delta-opioid selectivity
- ✓improved conformational stability
- ✓analgesic receptor mapping
- ✓useful in chronic pain models
Nociceptin Dosing
no established human dose|research-only dosing varies
DPDPE Dosing
Intrathecal 0.01-1 ug per animal|Intracerebroventricular 0.01-0.5 ug per animal|In vitro 0.1-20 nM
Nociceptin Side Effects
- ⚠sedation
- ⚠dysphoria
DPDPE Side Effects
- ⚠sedation
- ⚠nausea-like opioid effects
- ⚠tolerance with repeated dosing
Research Overview
Nociceptin
Nociceptin is a major pain-pathway peptide in the spinal cord, brainstem, and trigeminal system. Its relevance to migraine and neuropathic pain is mainly preclinical, where receptor-selective tools are being explored.
DPDPE
DPDPE is widely cited in opioid pharmacology because it helped establish the functional role of delta-opioid receptors in pain control. Its constrained structure is also used to explore how peptide cyclization changes potency, stability, and tissue selectivity.
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