Oxytocin

Estimated Market Price

$84.99 – $99.99

Based on verified supplier pricing for research-grade compounds

The bonding hormone. Enhances sexual satisfaction, reduces social anxiety, and promotes emotional connection. Available as intranasal research compound.

How it works

Binds oxytocin receptors in the brain to promote social bonding, trust, and stress reduction. Peripherally, it triggers uterine contractions and milk release, and also modulates pain and inflammation.

Sexual Health

What to Expect

15–30 min Intranasal absorption; initial calming and warmth sensation. Warm, calm feeling; anxiety melting away.

30–60 min Peak prosocial and anxiolytic effects; enhanced empathy. Feeling more connected and empathetic; conversations flow.

2–4 hours Effects gradually tapering; stress reduction persisting. Still feeling relaxed and socially open.

6 hours Return to baseline; safe to re-dose if needed. Effects faded; back to normal baseline.

Verified Suppliers

For research purposes only. These suppliers have been independently verified by PepSpace. We do not process sales directly.

PepSpace is not affiliated with any listed supplier

LarnaLabs Verified Supplier · larnalabs.com

NXPeptides Verified Supplier · nxpeptides.com

BioSynth Verified Custom Batch Supplier · biosynth.com

Peptide Sciences Unavailable · peptidesciences.com

Protocol & Dosage

Typical Dosage 10–40 IU intranasal

Administration Intravenous, Intramuscular, Intranasal

Schedule As needed; typically before social or bonding situations

Protocol Duration As needed (PRN)

Half-Life ~3-5 minutes (IV)

Side Effects & Safety

Tolerability Profile Moderate

Notable side effects likely; manageable with proper awareness

Common Side Effects

Nauseasome users
Headachesome users

Less Common

Uterine hyperstimulation (obstetric use)occasional
Tachycardia (increased heart rate)occasional
Hypotensionoccasional
Vomitingoccasional
Flushingoccasional

Rare / Serious

Hyponatremia / water intoxication (prolonged IV)rare
Cardiac arrhythmiarare
Seizures (secondary to water intoxication)rare
Uterine rupture (obstetric overdose)rare

Discontinue If

Signs of water intoxication (confusion, severe headache, nausea)
Uterine hypertonicity or fetal distress (obstetric)
Cardiac symptoms (palpitations, chest pain)
Seizure activity

Contraindications

Pregnancy (unless medically supervised labor induction)
Cardiovascular disease
Hyponatremia or fluid imbalance

Data note: FDA-approved for labor induction (Pitocin). Intranasal research use has a milder side effect profile. Water intoxication risk is primarily with prolonged IV administration.

Always consult a qualified healthcare professional before use. This information is for research reference only and does not constitute medical advice.

Ask about Oxytocin

How to Apply

Gather

Peptide vial, BAC water, alcohol swabs, insulin syringe

Sanitize

Wipe tops of both vials with alcohol swabs

Draw

Pull 1–2 mL of BAC water into syringe

Add Water

Release water slowly along vial wall, not directly on powder

Swirl

Roll between palms until dissolved. Never shake.

Store

Refrigerate 2–8°C, use within 30 days

Frequently Asked Questions

Yes. Bacteriostatic water (BAC water) is required to reconstitute lyophilized (freeze-dried) peptides. It contains 0.9% benzyl alcohol which prevents bacterial growth, keeping your reconstituted peptide safe for multiple uses over up to 30 days.

Unreconstituted: store at -20°C (freezer) for long-term, or 2–8°C (fridge) for short-term. After reconstitution: always refrigerate at 2–8°C and use within 30 days. Keep away from direct sunlight.

Results vary by individual and protocol. In research settings, measurable effects are typically observed within 1–4 weeks depending on the specific peptide, dosage, and application. Consult a qualified professional for guidance.

Verified suppliers typically include a full third-party COA verifying purity (99%+), identity, and sterility. We recommend only sourcing from vendors that provide batch-specific testing data.

We list verified suppliers above that have been independently reviewed for product quality, testing transparency, and shipping reliability. Always verify COA data before sourcing.

Compound Profile

Scientific data & classification for Oxytocin

Also Known As OT, Pitocin, Syntocinon, "Love Hormone"

Classification Cyclic Nonapeptide · Neurohormone

Sequence Cys-Tyr-Ile-Gln-Asn-Cys-Pro-Leu-Gly-NH₂ (cyclic disulfide)

Molecular Formula C₄₃H₆₆N₁₂O₁₂S₂

Molecular Weight 1,007.19 Da

CAS Number 50-56-6

Half-Life ~3-5 minutes (IV)

Origin Naturally produced in hypothalamus, stored in posterior pituitary

Administration Intravenous, Intramuscular, Intranasal

Status FDA Approved - labor induction, postpartum hemorrhage

Mechanism of Action Binds oxytocin receptors in the brain to promote social bonding, trust, and stress reduction. Peripherally, it triggers uterine contractions and milk release, and also modulates pain and inflammation.

Research Overview Oxytocin is a cyclic nonapeptide neurohormone with a disulfide bridge between cysteine residues at positions 1 and 6, synthesized primarily in magnocellular neurons of the hypothalamic paraventricular and supraoptic nuclei and released from nerve terminals in the posterior pituitary gland into systemic circulation. First isolated and synthesized by Vincent du Vigneaud in 1953 - work for which he received the Nobel Prize in Chemistry in 1955, making oxytocin the first polypeptide hormone to be chemically synthesized - the molecule has evolved from being understood primarily as a peripheral reproductive hormone to being recognized as one of the most important neuromodulators in the central nervous system. In its classical peripheral roles, oxytocin stimulates uterine smooth muscle contraction during labor (the "Ferguson reflex" positive feedback loop) and myoepithelial cell contraction in the mammary glands for milk ejection during breastfeeding. Synthetic oxytocin (Pitocin) has been used clinically for labor induction and augmentation for over six decades. However, the discovery of widespread oxytocin receptor expression throughout the brain - including the amygdala, hippocampus, nucleus accumbens, ventromedial hypothalamus, and prefrontal cortex - revealed its central role in social cognition and affiliative behavior. Intranasal oxytocin administration has been shown to increase trust, enhance recognition of facial emotional expressions, promote in-group affiliation, reduce social anxiety, and increase empathic accuracy in both healthy individuals and clinical populations. Research in autism spectrum disorder has shown that intranasal oxytocin can improve social cognition and eye contact, though clinical trial results have been mixed regarding sustained therapeutic benefit. The oxytocin system also modulates pain perception - oxytocin neurons project to the spinal cord dorsal horn and brainstem, where oxytocin release inhibits nociceptive signaling - and inflammatory responses, with oxytocin receptor activation in immune cells suppressing NF-κB signaling and pro-inflammatory cytokine production.

Citations

Published findings on Oxytocin from peer-reviewed journals.

Intranasal oxytocin increases positive communication and reduces cortisol levels during couple conflict

Ditzen B, et al. • 2009 PubMed

Effect of intranasal oxytocin on the core social symptoms of autism spectrum disorder: a randomized clinical trial

Yamasue H, et al. • 2020 PubMed

Intranasal oxytocin, social cognition and neurodevelopmental disorders: A meta-analysis

Alvares GA, et al. • 2017 PubMed