Oxytocin

Oxytocin is a nonapeptide hormone that promotes uterine contraction, lactation, and emotional bonding. Intranasal oxytocin is under investigation for its effects on social cognition, emotional regulation, and conditions like autism and anxiety. It modulates brain circuits related to trust, fear, and empathy.

• Binds to oxytocin receptors (OXTR) in the uterus and brain
• Triggers intracellular calcium release, causing muscle contraction
• Activates regions of the brain linked to empathy, trust, and bonding
• Modulates social cognition and fear response in the amygdala

• unit: IU

  low dose: 12

  frequency: Varies; often 2–3 times daily for behavioral use

  high dose: 48

  standard dose: 24

  administration route: Intranasal

• Apply 1–2 sprays per nostril up to 3x daily. Use in 5-on/2-off cycles or as needed for social and emotional regulation.

common: ["Nasal irritation and discomfort (14% in trials)","Headache (10%), dry mouth, runny nose","Burning sensation in nose (10%), lightheadedness","Irritability (9%), tiredness (7%)"]

sequence: CYIQNCPLG

half life: 3–5 minutes in peripheral blood

degradation: Cleared rapidly via hepatic and renal enzymatic breakdown

molecular weight: 1007.19

molecular formula: C43H66N12O12S2

tissue specificity: Acts centrally in the hypothalamus and limbic system, peripherally in uterus and mammary tissue

• The Oxytocin Receptor: From Intracellular Signaling to Behavior.mechanismPMID 29897293 ↗
• Oxytocin, Neural Plasticity, and Social Behavior.reviewPMID 33823654 ↗