I see in your sig that he is a happy spitter. the prevacid is going to do NOTHING for the spitting up. It will shut off the pumps so that it won’t be acidic when it comes up and burns the esophagus, but it will not stop the spitting. The erithro might help with that as it is a motility drug, but if he is a happy spitter, you mostly just have a laundry problem.
Sorry if I missed he turned from a happy spitter to a screamer…. If so, then I would try to dose he gave you first and then try to talk to him if you think you need to increase..
Thanks!
Ann Marie