This joint 2015 Australian/German rodent study found that oxytocin bound to the brain receptors that cause loss of motor control with alcohol intoxication, and prevented rats from displaying these symptoms:
“While oxytocin might reduce your level of intoxication, it won’t actually change your blood alcohol level,” Dr Bowen said. “This is because the oxytocin is preventing the alcohol from accessing the sites in the brain that make you intoxicated, it is not causing the alcohol to leave your system any faster.”
Vasopressin didn’t have the same effect.
The level of alcohol used to produce this finding was roughly equivalent to a human drinking a bottle of wine over a few hours. Oxytocin didn’t prevent loss of motor control when the equivalent of a bottle of vodka was administered because the excess ethanol found its way into other brain receptors and put the rats to sleep.
The study showed oxytocin acting in its original functionalities such as water regulation rather than with its evolved social functions as described in How oxytocin and vasopressin were repurposed through evolution to serve social functions.
http://www.pnas.org/content/112/10/3104.full “Oxytocin prevents ethanol actions at δ subunit-containing GABA-A receptors and attenuates ethanol-induced motor impairment in rats”