Caro I think that you have to look at how the medications are working, the infant mix will only ever be a temporary fix to the problem, and I also wouldn't give that long term, something like gastrogel has aluminium in it and isn't advised in periods of longer than 2 weeks (in saying that you do what you have to do- I have LOL)

I think what you were seeing is the losec working with the mix, I know you said it takes 6-12 hours to get out of the system, while this is true not all is out of their system for at least 5-7days, which is why if you need to do testing they make you stay off medication this long. I don't know how much you were prescribed, but I would keep it as prescribed, splitting the dose makes a big difference also, as children will metabolise the drug quicker thats why at least every 12 hours is recommended.

I used to give Parker losec, and zantac at one stage, and also mylanta when he would have a flare, now we generally only have to give him the losec which is great, you do work out the dose etc.... eventually.

The only problem with the losec is that compounded it starts to loose efficiency after two weeks (the pharmacist probably won't agree, but I know lots of people who do notice it), we get ours compouded two weekly, but if we don't we start to see the reflux coming back after about 14 days... so keep an eye out for that also, good luck!