Hi,
My lo was also on infacol as he had problems bringing up his wind. I took him off it at around 3 months as I noticed that every time he brought wind up he would get sick. They say that if they are doing this, then the infacol is working too well and bringing up the milk with his wind.
I found that when I stopped it he brought up his own wind fine, most of the time I don't even have to wind him now, he does it himself.
You can try your lo with one bottle and if you find that he is battling then just use it again on your next one.
Let me know how it goes.
Regards
Paula - Mum to Thomas (almost 4mnths)