PACAP-38 vs Desmopressin
Head-to-head comparison of PACAP-38 (Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38)) and Desmopressin (1-Deamino-8-D-arginine vasopressin) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | PACAP-38 | Desmopressin |
|---|---|---|
| Category | Cognitive Enhancement | Cognitive Enhancement |
| Full Name | Pituitary Adenylate Cyclase-Activating Polypeptide-38 (human PACAP-38) | 1-Deamino-8-D-arginine vasopressin |
| Molecular Weight | 4534 Da | 1069.22 Da |
| Half-Life | minutes | 1.5-3 hours |
| Amino Acids | 38 aa | 9 |
| Typical Dose | 10-100 µg preclinical range | 10-40 mcg intranasal |
| Route | Intranasal | Intranasal/Oral |
| Purity | ≥98% | ≥98% |
| Studies Count | 650 | 35 |
| Research Status | Pre-clinical | Clinical |
PACAP-38 Benefits
- ✓synaptic plasticity
- ✓BDNF upregulation
- ✓neuroprotection
- ✓memory consolidation
Desmopressin Benefits
- ✓memory consolidation
- ✓reduced pressor burden
- ✓recall support
- ✓short-term learning
PACAP-38 Dosing
0.1-1 nmol ICV in rodents|10-100 µg intranasal in preclinical studies|single-dose or short repeated protocols
Desmopressin Dosing
intranasal research dosing|10-40 mcg or IU-equivalent studies|single-dose protocols
PACAP-38 Side Effects
- ⚠headache-like effects
- ⚠flushing
- ⚠hypotension
Desmopressin Side Effects
- ⚠hyponatremia
- ⚠headache
- ⚠nasal irritation
Research Overview
PACAP-38
PACAP-38 is one of the most studied endogenous neuropeptides for protecting neurons from ischemic and excitotoxic damage. Preclinical literature also links it to hippocampal plasticity and learning-related signaling, including increased BDNF expression.
Desmopressin
The literature is mixed, but desmopressin has shown memory-related effects in selected populations and experimental paradigms. Its cognitive effects are usually discussed as a vasopressin-pathway probe rather than a primary nootropic.
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