The trust-me drug that makes you take social risks

Just oxytocin:

The researchers found that—in the trust game, but not the risk game—OT reduced activity in two brain regions: the amygdala, which processes fear, danger and possibly risk of social betrayal; and an area of the striatum, part of the circuitry that guides and adjusts future behavior based on reward feedback.

Baumgartner and colleagues concluded that their findings showed that oxytocin affected the subjects' responses specifically related to trust . . . "If subjects face social risks, such as in the trust game, those who received placebo respond to the feedback with a decrease in trusting behavior while subjects with OT demonstrate no change in their trusting behavior although they were informed that their interaction partners did not honor their trust in roughly 50% of the cases."