You're talking about two entirely different and highly specialized types of nursing.
You'd be at slight advantage on a med/surg floor dealing with the psychological issues your patients have, but you'd be at a major disadvantage in dealing with the medical isssues and dealing with the respiratory, gi, gu, post-op and other surgical issues that you don't usually encounter in a Psych ward.
Andrew Lopez, RN
http://www.nursefriendly.com