The unit I work on is a oncology unit, although we also get medical pts as well. We had a new RN that had been pulled from another floor on night shift, and she was assigned a pt who had been on our floor 2 days. This pt was in for etoh abuse, and had been going through DT's, and was recieving ativan iv. He had not slept for days. The nurse also had a ca pt who was receiving dilaudid for pain control. She had drawn up in two syringes the ativan and dilaudid to save time, and gave the dilaudid to the etoh pt by mistake. The pt went out, but was breathing. All night the pt slept, and the nurse didn't take vitals or disturb the pt because the charge nurse on nights told her to not disturb him since he had not slept in days. The new rn had tried to wake him, but he would not wake up. When The narcotic count was being done, it was discovered that the nurse had given the wrong med to the wrong pt. Still no one checked on this pt. When we got out of report for day shift, I went in to assess this pt and I could not wake him up, not knowing what had happened on night shift because it was not passed on in report and the night nurses had already left, The pt sat was in the 50's, and had probably been there for a long time. The New rn, and the assistant nurse manager both lost their license. The pt is a vegtable still in our hospital, not on our floor of course.