- Use of any of the following prokinetic medications during the current ICU admission: domperidone, cisapride, neostigmine, or opioid antagonists, including alvimopan, naloxone, naltrexone, or analogs of naloxone or naltrexone; erythromycin or azithromycin [N.B., azithromycin is permitted for treatment of pulmonary infections up to 48 hours before randomization, but not thereafter through Day 5. Up to 2 doses of metoclopramide are permitted, provided that drug is not administered within 10 hours of the first dose of study drug or at any time through Day 5. If a patient receives metoclopramide during the screening period, a radiologic examination must confirm that the feeding tube remains visible in the stomach after the final dose of drug during screening and to prior to the start of baseline gastric emptying measurements and has not migrated to the duodenum. Use of clarithromycin for any indication is not excluded. Propofol must be discontinued before screening. However, its use may be permitted under special circumstances subsequent to the first dose of study drug but not in excess of 12 hours administration over the 5-day study period.]