I think doctors should be careful before prescribing something like an oxytocin nasal spray to patients. I heard about this study awhile back that said oxytocin makes people more trusting. Imagine trying to treat someone for an oxytocin deficiency, and basically drugging them into compliance with everyone else around them!
I know I would hate to have my personality changed so drastically. But seriously, I think this could have negative ramifications for anyone taking it. In fact, it almost sounds like a plot from a movie: a drug that makes people more trusting.