A bolus of oxycodone or morphine 10% calculated dose for intravenous infusion 0.075mg intravenous palonosetron prophylaxis of emesis Detection and assessment of severity of adverse drug reactions will be conducted by an interview that will be at 0,1,2,6,12 and 24 hours after the onset of analgesia. Instrument designed for the detection of RAM will be used and classify its severity according to common terminology criteria for adverse events (CTCAE). Futhermore, measuring systemic blood pressure, heart rate, oxygen saturation will be performed through the use of Nihon Kohden monitor (model BSN-2301K). Pain assessment will be made by the numerical scale (NRS). The researcher responsible for the detection and assessment of adverse reactions to opioids and others determinations, remain mowed.