Intrathecal Dexamethasone and Atropine on Morphine Induced Post-operative Nausea and Vomiting on Caesarean Section

Pain is a major problem during the postoperative period and can be considered as a challenge for the anesthesiologist. Low dose intrathecal morphine is proven efficient as a mode to reduce postoperative pain. Morphine has many complications like post-operative nausea and vomiting (PONV). the investigators will investigate the utility of intrathecal (IT) atropine and dexamethasone for prevention of morphine induced PONV as a primary outcome in parturient undergoing CS under spinal bupivacaine anesthesia plus morphine sulfate as an adjuvant.

Pain is a major problem during the postoperative period and can be considered as a challenge for the anesthesiologist. Low dose intrathecal morphine is proven efficient as a mode to reduce postoperative pain in many surgical areas including Caesarean delivery. Morphine has many complications namely pruritus, and post-operative nausea and vomiting (PONV). The other risk factors for the development of PONV include female gender, non-smoker status, general anesthesia with inhalational anesthetics and surgical factors (duration and type of surgery). The supplementation of morphine, however raises the occurrences of postoperative nausea and vomiting (PONV) in these patient To tackle this problem, the investigators have to use the combination therapy of antiemetics like a serotonin receptor antagonist of either intravenous (IV) ondansetron or granisetron with IV dexamethasone is administered after the administration of intrathecal morphine. Dopamine receptor antagonists e.g. droperidol and metoclopramide are commonly used, but they carry the risk of extrapyramidal symptoms.