What is the dose? Zantac is extremely weight sensitve, if you are seeing some difference it may just need to be increased. If you give me his weight I can work out what the recommended dose is for him.

In terms of how long to give it, zantac some positive results is usually seen within a couple of days, but true results may take a couple of weeks, it depends on a lot of things, including how severe it is, and if it has caused any inflammation while it has been untreated.

I would get the dose checked, if another week it isn't any better, I would move on to another med.

With the mylanta/gaviscon, these should only ever be given under doctors agreement, and generally for periods less than two weeks, first off some types contain aluminium and also they contain some chemicals shouldn't be given full time to a baby. Zantac is a safer option and also a better one (if it works) as it will last longer than mylanta which is a quick relief but not for as lasting.

Reflux does drive you nuts with the should I shouldn't I, but eventually you get the hang of it.