Active peptic ulcer disease;kown intraluminal metastatic lesion/s with suspected bleeding;inflammatory bowel disease; ulcerative colitis, or other gastrointestinal conditions with increased risk of perforation; history of abdominal fistula, gastrointestinal perforation, or intra-abdominal abscess within 28 days prior to beginning study treatment; malabsorption syndrome; major resection of the stomach or small bowel.