This study is a randomized, double-blinded clinical trial in Imam Khomeini Teaching Hospital, Sari. Following Ethics Committee approval and complement informed consent, 100 parturient females referred for cesarean section under spinal anesthesia based on American Society of Anesthesiologists (ASA) category in class of I or II, by used closed packages are allocated randomly to one of the two groups of 50. Inclusion criteria including patients aged 20-35 years, and
exclusion criteria including indisposition, emergency section, prolonged surgery, smoking and narcotic user and psychiatric disorders. The intervention group is received Metoclopramide as 10 mg per kg Metoclopramide intravenously at the end of surgery. The control group is received Normal Saline intravenously in the same volume of Metoclopramide based on milliliter at the end of surgery. After surgery, PCA pumps (morphine 25 mg, 1 gr Apotel and the rest to a volume of 50 ml saline) is prepared for all patients. Outcome of Pain severity and complications such as nausea and vomiting are evaluated in recovery and at the times of 2, 4, 6, 12, 18, 24 hours after surgery.