Dexamethasone Versus Methylprednisolone for the Treatment of Active Inflammatory Bowel Disease

Inclusion Criteria: * Parental informed consent * Subjects 6 to 19 years of age with confirmed diagnosis of IBD (Crohn's disease, ulcerative colitis or indeterminate colitis), who on admission to the hospital have a PCDAI\>15 or a Clinical-Activity Index for the Evaluation of Patients with Ulcerative Colitis of \>10. * Infectious causes (viruses, bacteria, parasites) have been ruled out. Exclusion Criteria: * Subjects in which the administration of corticosteroids would be contraindicated such as systemic or enteric infections diagnosed by stool analysis including culture, Clostridium Difficile toxin assay, rotavirus or adenovirus 40/41 antigens. * Subjects with enterostomy or colostomy * Subjects with one or more of the following conditions: unstable vital signs, acute abdomen, toxic megacolon, intestinal obstruction, intestinal perforation