Immediate Oral Refeeding Compared to Hunger Based Refeeding and Conventional Oral Refeeding in Patients with Mild and Moderate Acute Pancreatitis - A Multi-Arm Randomized Controlled Trial

After obtaining informed consent, the patients with mild and moderate will be randomly allocated to either the IORF, HBORF or CORF group. Patients in the IORF group will be started on a low-fat solid diet immediately upon hospital admission, regardless of symptoms or laboratory parameters. Patients in HBORF group, oral refeeding in the form of oral clear liquid will be commenced once they feel hungry regardless of the pain abdomen and laboratory parameters. For patients in the CORF group, oral diet will be re-introduced in a stepwise manner from fasting, then to clear liquids, and finally, a low-fat solid diet when the patients meet the following criteria: absence of abdominal pain and presence of peristalsis, pancreatic enzymes twofold below the reference limit, blood leukocyte level <15000/mm3, and decreased C-reactive protein level.