C. - My boys both were diagnosed with reflux. My Dr. had me thicken their formula with Rice Cereal (milk shake consistency) to help them keep their food down. The medicine that was prescribed was Zantac.
Neither boy had a problem with diarhea like you are describing, but when my older son has an occasional bout with it, I follow the BRAT diet. Bananas, Rice, Applesauce, Toast for a few days until it clears up. If you are looking for alternatives to rice cereal try Rice Chex and cooked rice.
For constipation, juices like prune help. And Graham Crackers will also loosen things up.
I know that when a child has diarhea they become very dehydrated. So the pedialite might be very imperative for you to make sure the baby has enough fluids. My son wouldn't drink it so I gave him the pops, which he liked because of getting new teeth around the same age.
I also switched my son from formula to whole milk when he turned 1. (hint - take away the bottles and use sippy cups now or you will be have trouble taking away the bottles later!) But, as far as formula goes, my Dr. recommends Nestle Good Start Supreme, because she says it is easier for the baby to digest when they have AR. I have been adding the rice cereal to this formula in my little one since he was about 9 weeks old.
I hope all of the above helps. Hang in there, he should be outgrowing this soon.
W.