The purpose of this program will be to educate and inform system pharmacists about the gastrointestinal complications that arise in our critically ill and post-surgical patient populations. The topics that will be covered will include a brief introduction on feeding in these complex patient populations, as well as the pathophysiology and pharmacologic management of constipation, post-operative ileus and Ogilvie's Syndrome. In addition, medications used to treat these conditions and patient specific monitoring that is required with drugs such as neostigmine, alvimopan and methylnaltrexone will be discussed. The activity will describe the purpose of the REMS program associated with alvimopan, and lastly go into our ERAS/STAAR post-operative enhanced recovery protocols that are necessary to alleviate and prevent the aforementioned complications.