###Human: Why is a 5-week-old spitting after formula feed? ###Assistant: Hello. I got your concern. It is possible due to evening colic or reflux. Do proper burping after feeding. You can start tablet Junior Lanzol (15 mg) half tablet once a day. At present continue same formula feeds. Monitor his weight regularly. For constipation in infants less than six months: If they are passing stool 3 to 4 times a day or once in 3 to 5 days, it is normal. I hope that all his newborn screen is normal.