Oxytocin

FDA Approved

Oxytocin

Aliases
Pitocin, Syntocinon
Administration
IV/IM injection (approved, obstetric), Intranasal spray (research, off-label)

How it works

  1. Binds oxytocin receptors in the uterus, triggering smooth muscle contraction

    In the body, it attaches to receptors in the uterus and triggers contractions — this is the basis for its approved use in labor.

  2. Acts centrally in the brain to modulate social bonding, trust, and anxiety circuits

    In the brain, it acts on entirely different circuits tied to trust, bonding, and social connection.

  3. Reduces amygdala reactivity to social and emotional stimuli in neuroimaging studies

    Brain-imaging studies show it calms the brain's fear-response center when people are shown social or emotional cues.

Result

In its approved use, effective induction of labor and control of bleeding after childbirth; in research settings, increased feelings of trust and social connection. In the research context, people describe feeling warmer, more connected to others, and less socially anxious.