Psychiatric nurses are registered nurses, or RNs, employed in psychiatric hospitals or facilities. These nurses differ from other registered nurses, as they must understand what psychiatrists do and how psychiatric facilities operate.Psychiatric nurses help to diagnose mental illnesses, treat patients, and advise families on how best to help members with mental illnesses. Many psychiatric nurses can also prescribe medication, which is different from nurses in other medical fields. These nurses carry out many of the same duties as psychiatrists, except for administering psychological tests.Psychiatric nurse jobs are great for those that prefer to work in teams. These nurses not only work with patients, but work with other nurses, psychiatrists, counselors, and other health care professional