After the enrollment, all children will be randomly assigned to receive Chamomilla L., Melissa Officinalis L. and tyndallized L. Acidophilus (H122) (Group A), L reuteri DSM 17938 (108 CFU) (Group B) or Simethicone (Group C). Treatment will be given to subjects for 28 days. The study's primary outcome is defined as a reduction in the duration of average crying times, from baseline (day 0) to end of treatment (day 28). The secondary outcome measure is the number of participants who respond to treatment on days 28. Infants who experience a decrease in the daily average crying time of 50% from baseline will be considered as responders to the treatment. Parents will be instructed to complete a structured 28-day maternal diary, modified from Barr et al. in order to record the frequency of colic episodes and the daily crying and fussing time (in minutes), feeding schedule, stool frequency and characteristics, and any adverse events experienced (14). Follow-up visits will be conducted on study days 7, 14, 21 and 28 by the same study investigator. At that visit, diaries and unused study products will be returned.