Our Ped GI stated that liquid
Zantac is hard to correctly dose since it is given by weight and since
babies are constantly growing, your little one may have outgrown his dose already. It can take as little as 2 weeks to outgrow Zantac dosage. This also might cause the constant waking. If your son is on solids it's very easy to use solutabs or capsules, just disolve solutab in food, or break capsule and pour contents into food.