Is recall of dreaming during anesthesia a sign of occurrence of postoperative nausea and vomiting?

We examined the relationships between recall of dreaming during anesthesia and postoperative nausea and vomiting (PONV). We found a relationship between PONV within 24 h and age <50 years, use of postoperative epidural analgesia with morphine, and female gender. We also found a relationship between PONV lasting more than 24 h and dream recall. As serotonin plays an important role for both inducing PONV and dream recall, results of the present study may suggest a possible relationship between dream recall and PONV.