how much do they weigh and what dose are they on? I THINK I remember the allergist saying we could up his dose to 2xs per day if his reflux wasn't improving. He is currently taking 1/4 a tsp once a day and weighs about 7lbs. Also, how long was your LO on Zantac before seeing an improvement? Poor DS is in so much pain and it makes him and me miserable!