Hello! I agree with Stephanie that it is important to check in with the doctor. There is a lot of guess work with babies and sometimes it isn't clear if the medication is causing new problems or if there is a new health issue.   There is a big range of dosing for babies since babies tend to metabolize their medication very rapidly compared to adults. Sometimes an adult is on the same dose of Prevacid medication as a child. This just doesn't seem right but research has shown that the dosing used by doctors is the most effective.   Prevacid is time released meaning a little bit of medication can last for 24 hours. Be sure to check with the doctor and pharmacist about how to give him the tablet. When a baby or toddler cannot swallow a pill, the pharmacist will compound it into a liquid that can be given from a medication spoon or medication syringe. Certain types of Prevacid should not be crushed because it will make the medication inactive.   Jan Gambino The Reflux Mom