my baby is on enfamil AR since he was 3 mo. and it helped with the spit up (but he is not intolerant to lactose) after he grew up the reflux at 9mo. his doctor said we just continue until the year mark since he is doing very good on it…… as for the constipation well just giving him water and fruits during the day it helped him although he wasnt never that constipated hope it works for you too