Task: Answer Verification
Input (English): Question: Is intrathecal addition of morphine to bupivacaine the cause of postoperative nausea and vomiting?
Answer: Administration of metoclopramide did not reduce the overall incidence of PONV. Our study shows no relationship between the use of intrathecal morphine and the incidence of PONV during the first 24 hours postoperative.
Output (English): no