Vasopressin
Also known as: ADH, Antidiuretic Hormone, AVP, Arginine Vasopressin
Vasopressin is a naturally occurring peptide hormone that regulates water retention, blood pressure, and social behavior through its actions on V1a, V1b, and V2 receptors.
Vasopressin is a 1084.23 g/mol research peptide. Vasopressin is a naturally occurring peptide hormone that regulates water retention, blood pressure, and social behavior through its actions on V1a, V1b, and V2 receptors.
Also called: ADH, Antidiuretic Hormone, AVP
1084.23 g/mol
Molecular Weight
Daltons
3
Strong Evidence
benefits
5
Studies Cited
peer-reviewed
5-10
Typical Dose
units
Overview
Vasopressin functions as both a hormone and neurotransmitter, produced in the hypothalamus and released by the posterior pituitary gland. This nine-amino acid peptide plays essential roles in maintaining fluid balance through antidiuretic effects, vasoconstriction for blood pressure regulation, and modulation of social cognition and memory formation. Research applications focus on its potential therapeutic uses in diabetes insipidus, septic shock, memory enhancement, and social behavior disorders. The peptide's dual peripheral and central nervous system actions make it valuable for studying neuroendocrine function and developing treatments for various medical conditions.
Key Takeaways: Vasopressin
- Strongest evidence supports Vasopressin for water retention and fluid balance and blood pressure regulation
- Research doses typically range from 5 to 10 units via subcutaneous/intramuscular
- 3 benefits with strong evidence, 3 moderate, 1 preliminary
- Half-life: 10-20 minutes (plasma)
- 5 cited research studies in this guide
Mechanism of Action
Vasopressin binds to three main receptor subtypes: V2 receptors in the kidney increase water reabsorption through aquaporin-2 channel insertion; V1a receptors in vascular smooth muscle cause vasoconstriction via phospholipase C activation; and V1b receptors in the pituitary and brain modulate ACTH release and influence social behavior, memory consolidation, and stress responses through calcium signaling pathways.
Research Benefits
Vasopressin at a Glance
Vasopressin binds to three main receptor subtypes: V2 receptors in the kidney increase water reabsorption through aquaporin-2 channel insertion; V1a receptors in vascular smooth muscle cause vasoconstriction via phospholipase C activation; and V1b receptors in the pituitary and brain modulate ACTH release and influence social behavior, memory consolidation, and stress responses through calcium signaling pathways.
Water Retention and Fluid Balance
Strong EvidenceIncreases water reabsorption in the kidneys by stimulating V2 receptors, which insert aquaporin-2 water channels into collecting duct cells, reducing urine output and maintaining proper hydration status.
Blood Pressure Regulation
Strong EvidenceCauses vasoconstriction through V1a receptor activation in peripheral blood vessels, increasing systemic vascular resistance and supporting blood pressure in hypotensive states or shock conditions.
Cardiovascular Support in Shock
Strong EvidenceProvides vasopressor support in distributive shock states where catecholamine responsiveness is diminished, particularly effective in septic shock and post-cardiac arrest scenarios.
Memory Enhancement
Moderate EvidenceFacilitates memory consolidation and retrieval through V1a and V1b receptor activation in hippocampal and cortical regions, improving both short-term and long-term memory formation processes.
Social Bonding and Recognition
Moderate EvidenceModulates social behavior patterns including pair bonding, social recognition, and trust through central V1a receptor signaling in limbic brain regions, particularly the amygdala and nucleus accumbens.
Stress Response Modulation
Moderate EvidenceInfluences HPA axis activity through V1b receptors in the anterior pituitary, affecting ACTH and cortisol release patterns during acute and chronic stress responses.
Circadian Rhythm Regulation
PreliminaryContributes to circadian clock function through SCN neurons, helping maintain proper sleep-wake cycles and coordinating peripheral clock gene expression with environmental light cues.
Research Dosing Protocols
Research Purposes Only: All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
| Research Protocol | Dose Range | Route |
|---|---|---|
| Diabetes insipidus treatment | 5–10 units | subcutaneous/intramuscular |
| Vasodilatory shock support | 0.01–0.1 units/min | intravenous infusion |
| Cognitive enhancement research | 10–40 IU | intranasal |
| Social behavior studies | 20–60 IU | intranasal |
Frequency
Variable based on application - single dose for acute studies, 2-3x daily for sustained effects
Timing
Morning administration preferred for circadian alignment, pre-task for cognitive studies
Cycle Length
Acute studies: single dose; Clinical applications: continuous as needed
Research Notes
- 1Intranasal delivery bypasses blood-brain barrier for central effects
- 2IV infusion requires careful hemodynamic monitoring
- 3Dose titration based on response and electrolyte monitoring
- 4Research protocols require ethics approval for human studies
Reconstitution Guide
Standard Reconstitution
Vial Size
20 mg
Bacteriostatic Water
2 mL
Concentration
100 mcg
per 0.1 mL (10 units)
Step-by-Step Guide
Gather Materials
Vasopressin vial, bacteriostatic water, alcohol swabs, insulin syringes.
Equilibrate Temperature
Remove the vial from storage and allow it to reach room temperature (5-10 minutes).
Sanitize
Swab the rubber stopper of both the peptide vial and bacteriostatic water vial with alcohol.
Draw Water
Draw 2 mL of bacteriostatic water into a syringe.
Add Water to Vial
Insert the needle into the peptide vial and direct the water stream against the glass wall — not directly onto the powder.
Mix Gently
Swirl the vial gently until the powder is fully dissolved. Never shake. The solution should be clear and colorless.
Store Properly
Refrigerate at 2-8°C. 2-3 years unopened, 28 days after reconstitution.
Storage Temperature
2-8°C
Shelf Life
2-3 years unopened, 28 days after reconstitution
Important Notes
- •Use sterile water or normal saline for injection
- •Gentle swirling to avoid foam formation
- •Store reconstituted solution under refrigeration
- •Protect from light and temperature extremes
- •Single-use vials to prevent contamination
Vasopressin Dosing Calculator
Calculate daily intake, cycle totals, and vials needed with pre-filled protocols →
Vasopressin Reconstitution Calculator
Calculate concentration, syringe units, and doses per vial with auto-filled values →
Safety & Side Effects
Reported Side Effects
- !Water retention and hyponatremia
- !Hypertension and vasoconstriction
- !Abdominal cramping and nausea
- !Headache and dizziness
- !Cardiac arrhythmias
- !Peripheral ischemia with high doses
- !Bronchoconstriction in sensitive individuals
- !Uterine contractions
- !Anxiety and mood changes
- !Fluid overload and pulmonary edema
Potential Interactions
- ⚡Tricyclic antidepressants may potentiate antidiuretic effects
- ⚡Lithium reduces renal responsiveness to vasopressin
- ⚡Carbamazepine and chlorpropamide enhance ADH action
- ⚡Demeclocycline antagonizes vasopressin effects on kidneys
- ⚡Ganglionic blocking agents may reduce pressor response
Important: Side effects and interactions listed here are compiled from published research and community reports. This is not a complete list. No formal drug interaction studies have been conducted for most research peptides. Always consult a qualified healthcare provider.
Research Studies
The following studies are referenced in this profile. PubMed IDs are provided where available for independent verification.
Vasopressin for septic shock in adults
Randomized trial showing vasopressin reduces mortality in less severe septic shock and decreases need for norepinephrine compared to norepinephrine alone.
Intranasal vasopressin improves social cognition in men
Double-blind study demonstrating that intranasal vasopressin enhances social cooperation and trust behaviors in healthy male subjects during economic games.
Vasopressin and memory consolidation
Research showing vasopressin administration enhances long-term memory formation through V1 receptor mechanisms in hippocampal circuits.
Vasopressin in cardiac arrest: systematic review
Meta-analysis examining vasopressin use during CPR, showing potential benefits in return of spontaneous circulation but mixed effects on survival outcomes.
Central diabetes insipidus treatment outcomes
Clinical review of vasopressin replacement therapy effectiveness in central diabetes insipidus, comparing different formulations and delivery methods.
Note: This is not an exhaustive list of all published research. Studies are selected for relevance and quality. Click PubMed IDs to verify sources independently. Inclusion does not imply endorsement of the peptide for any clinical use.
Frequently Asked Questions
Vasopressin is the natural hormone with both antidiuretic and vasoconstrictive properties, while desmopressin (DDAVP) is a synthetic analog with enhanced antidiuretic effects but minimal vasopressor activity, making it safer for long-term use in diabetes insipidus.
Intranasal vasopressin typically shows cognitive and social effects within 15-30 minutes of administration, with peak effects occurring 45-60 minutes post-dose and lasting 2-4 hours depending on the individual and dose used.
Yes, vasopressin can cause serious side effects including severe hyponatremia, dangerous blood pressure elevation, cardiac arrhythmias, and peripheral ischemia. Medical supervision is essential, especially with IV administration or in patients with cardiovascular disease.
Vasopressin is a prescription medication requiring proper medical oversight. Research use must comply with institutional protocols and regulatory guidelines. It is not legal for unsupervised personal experimentation or performance enhancement.
Medical uses include central diabetes insipidus, vasodilatory shock (especially septic shock), cardiac arrest resuscitation protocols, and certain bleeding disorders. Off-label research explores applications in autism, social anxiety, and memory disorders.
Reconstituted vasopressin should be stored in the refrigerator at 2-8°C, protected from light, and used within 28 days. Never freeze the solution, and inspect for particles or discoloration before each use.
Vasopressin interacts with several medications including tricyclic antidepressants (increased effects), lithium (decreased kidney response), and blood pressure medications. Always consult healthcare providers about potential drug interactions before use.
Essential monitoring includes serum sodium levels, fluid intake/output, blood pressure, heart rhythm, and kidney function. Frequent electrolyte checks are crucial to prevent life-threatening hyponatremia, especially during initial treatment phases.
Research & Educational Use Only
All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
The information presented here is compiled from published research studies and is intended for informational purposes only. Individual results may vary. Always consult with a licensed healthcare provider.