This will be a prospective, multicentre, open label, randomized, controlled trial. All consecutive infants diagnosed with IC, according to Rome III criteria, will be prospectively enrolled in a 12 months period by 3 different Pediatric Gastroenterology units: Department of Translational Medical Science, Section of Pediatrics, University of Naples "Federico II"; Institute of Pediatrics of the University of Foggia; Endoscopy and Gastroenterology Unit, Department of Pediatrics, University of Messina.