Abdominal pain/distension
Nausea/vomiting, inability to tolerate PO/enteral feeding
Constipation
Absent or hypoactive bowel sounds
Can produce intestinal ischemia, intestinal perforation, abdominal compartment syndrome
Ileus
Small bowel obstruction
Acute pancreatitis
See constipation, abdominal pain
Short bowel syndrome
Acute gastroenteritis 
Acute gastroenteritis
Chronic pancreatitis