Yesterday, 08:46 PM
Lots of saliva is entirely normal if it is a reaction to teething, and while 3 months is a little early in general, babies can teeth anytime so it is entirely possible teething is the root of the saliva. But I would also say that my son (who teethed very early) drooled an incredible amount from about month 3-8, and it never caused latch issues. So I would again wonder if the root issue is still a poor latch.
According to a quick search online, a side effect of Losec is nausea. Nausea certainly can cause excess saliva, so I wonder if it might be related. Also what form does the Losec come in? My oldest son as a baby was put on Zantac liquid for a while and it tasted so horrible (yes I tried it, it was absolutely disgusting even in the flavoring) he could not get it down and if he did, it made him gag. He was switched to Prevacid solutabs, dissolved in water. Those taste great and he sucked it in happily, but I have never been convinced it did much. I was later shocked to learn that his dosage (he was 4 months old) was the same as that given to me as an adult for firmly diagnosed GERD (I had an endoscopy) - and that dose caused ME intestinal discomfort and had to be reduced.
In the intervening years I have become very skeptical of medication for reflux in infants. Not saying it is never needed, I just think GER in infants is over-diagnosed, meds are over-prescribed, meds tested only on adults are used for infants, and consequently quite possibly prescribed in a too...