We were going to do the AR for my daughter with reflux but she ended up having to use GentleEase because her tummy was so sensitive, but the doctor told us that the AR was just a little thicker. So he had us grind up dry rice cereal in food processor/blender and then add a little of that to each bottle which was essentially the same thing as the AR. We were also adding Karo syrup for constipation, each bottle time was like a science project...LOL
I second the person who said that reflux hurts, I would give her the prevacid. My daughter took it and I swear by it, the poor baby was in pain and prevacid was her only relief she would cry for hours. I know someone people swear by chiropractors and I too hate giving a baby meds but I think you should seriously think about it. It is very painful and you don't want the poor thing to suffer =(
Good luck, I hope everything works out.