My daughter developed reflux at about 2 months or that is when I picked it up, thinking back she was restless before that but it got worse around 2 months. I tried infants friend after spending 5 nights rocking her none stop, it helped a little. Then I tried Donnalix which was fantastic, she is now 4.5 months and still takes it. In a couple of weeks I am going to take her off it and see how she goes, she didn't vomit but just seemed to be getting heart burn. My partner kind of blamed it on my milk and diet which made me feel really bad, I still haven't forgiven him.