Mild case + no biliary disease + no systemic complication + tolerating clears
Patients can be discharged when oral analgesics control their pain
All other patients
Acute pancreatitis
Gastroesophageal reflux disease 
Acute calculous cholecystitis
Peptic ulcer disease with or without perforation
Chronic pancreatitis
Gastritis
Duodenal hematoma
Pancreatitis