Prospective subjects must have been drinking large amounts of alcohol for a sustained period to qualify for this study and want help to stop or cut back on their drinking. Subjects will self-administer oxytocin or placebo in this study in an intranasal spray. The placebo spray contains all of the ingredients of the oxytocin spray EXCEPT oxytocin. Subjects' assignment to oxytocin or placebo treatment will be random (like a flip of a coin).